WorksheetsGEM Cardiovascular Drugs SBAs
Total questions: 216
Worksheet time: 4hrs 36mins
Name
Class
Date
1.
A 65-year-old woman with hypertension is prescribed a first-line oral diuretic by her GP. She is informed it is a mild medication that works on her kidneys and that she should take it in the morning to avoid nocturia. What is the generic name of the medication most likely prescribed?
a)
Spironolactone
b)
Bendroflumethiazide
c)
Furosemide
d)
Indapamide
e)
Amiloride
2.
A new junior doctor is reviewing a patient's medication list. They see a drug they do not recognise, described as inhibiting the Na+/Cl- co-transporter in the distal convoluted tubule of the nephron. This mechanism is characteristic of which class of drugs?
a)
Loop diuretics
b)
Potassium-sparing diuretics
c)
Osmotic diuretics
d)
Carbonic anhydrase inhibitors
e)
Thiazide diuretics
3.
A patient taking bendroflumethiazide for hypertension is admitted with severe weakness, nausea, and muscle cramps. An ECG shows prominent U waves. This presentation is most likely due to the drug's interaction with which electrolyte pathway?
a)
Increased calcium excretion
b)
Increased potassium excretion
c)
Decreased sodium reabsorption in the loop of Henle
d)
Decreased water reabsorption in the collecting duct
e)
Increased magnesium retention
4.
A medical student is revising the pharmacology of antihypertensives. They note that a particular diuretic causes an initial reduction in blood volume and cardiac output, but its long-term antihypertensive effect relies on a different mechanism. What is the principal mechanism responsible for the sustained blood pressure lowering effect of bendroflumethiazide?
a)
Renin inhibition
b)
Aldosterone receptor blockade
c)
Direct arteriolar vasodilation
d)
Reduction in peripheral vascular resistance
e)
Reduction in heart rate
5.
A 72-year-old man with a history of heart failure with reduced ejection fraction (HFrEF) is admitted with worsening peripheral oedema. His current medication includes ramipril and bisoprolol. The medical team decides to add a diuretic to his regimen. For which of the following patients is bendroflumethiazide specifically indicated as a first-choice agent?
a)
A 45-year-old with acute pulmonary oedema
b)
A 58-year-old with uncomplicated essential hypertension (NICE Step 1)
c)
A 70-year-old with nephrotic syndrome and severe ankle swelling
d)
A patient with symptomatic hyponatraemia
e)
A patient with acute hypercalcaemia
6.
A patient on long-term bendroflumethiazide for hypertension attends for a routine blood test. The results reveal a serum sodium of 132 mmol/L (normal 135-145), serum glucose of 8.5 mmol/L (fasting), and serum urate of 0.55 mmol/L (normal <0.42). Which set of abnormalities is a recognised adverse effect profile of this medication?
a)
Hypernatraemia, hyperglycaemia, hypouricaemia
b)
Hyponatraemia, hyperkalaemia, hypercalcaemia
c)
Hyperkalaemia, hypoglycaemia, hyperuricaemia
d)
Hyponatraemia, hyperglycaemia, hyperuricaemia
e)
Hypokalaemia, hypoglycaemia, hypouricaemia
7.
A 60-year-old man with hypertension has his medication changed from a calcium channel blocker to a "thiazide-like" diuretic after experiencing ankle oedema. His GP explains this new tablet works over 24 hours and he only needs to take it once daily. Which of the following is the generic name of the medication most likely prescribed?
a)
Hydrochlorothiazide
b)
Bendroflumethiazide
c)
Indapamide
d)
Chlorthalidone
e)
Metolazone
8.
A pharmacist is counselling a patient on their new antihypertensive. They explain that the drug works primarily by causing vasodilation, with only a weak diuretic effect, and that it is related to but not the same as classical thiazides. This description is most accurate for which class of drug?
a)
Loop diuretic
b)
Potassium-sparing diuretic
c)
Thiazide-like diuretic
d)
Osmotic diuretic
e)
Carbonic anhydrase inhibitor
9.
A patient taking indapamide presents with lethargy and muscle cramps. Blood tests reveal a serum potassium of 2.9 mmol/L. The doctor decides to prescribe a potassium supplement. Through which primary renal mechanism did indapamide most likely contribute to this patient's hypokalaemia?
a)
Inhibition of the Na+/K+/2Cl- cotransporter in the loop of Henle
b)
Antagonism of aldosterone in the collecting duct
c)
Inhibition of the Na+/Cl- cotransporter in the distal convoluted tubule
d)
Inhibition of carbonic anhydrase in the proximal tubule
e)
Osmotic diuresis throughout the nephron
10.
A pharmacology tutorial discusses how the long-term blood pressure-lowering effect of certain diuretics is largely independent of their diuretic action. One drug is highlighted as having a particularly strong direct effect on vascular smooth muscle. What is the predominant mechanism believed to be responsible for the antihypertensive efficacy of indapamide?
a)
Significant reduction in plasma volume and preload
b)
Reduction of intracellular calcium in vascular smooth muscle, causing vasodilation
c)
Central suppression of sympathetic outflow
d)
Blockade of vascular aldosterone receptors
e)
Inhibition of the renin-angiotensin system
11.
During a ward round, the consultant asks a foundation doctor to choose an appropriate antihypertensive to add to an ACE inhibitor for a 70-year-old Black African patient with hypertension, according to NICE guidelines. Which of the following is a correct first-line indication for indapamide based on UK guidelines?
a)
First-line monotherapy for all patients under 55 with hypertension.
b)
First-line add-on therapy (Step 1) for patients over 55, or of Black African/Caribbean family origin, with hypertension.
c)
First-line treatment for acute heart failure with pulmonary oedema.
d)
First-line treatment for resistant oedema due to nephrotic syndrome.
e)
First-line treatment for hypertension in pregnancy.
12.
A 75-year-old woman on long-term indapamide is found to have a persistently low serum sodium of 130 mmol/L on routine testing. She reports mild nausea but is otherwise well. Which adverse effect, also associated with classical thiazides, is indapamide particularly known for causing in elderly patients?
a)
Hyperkalaemia
b)
Hypercalcaemia
c)
Metabolic alkalosis
d)
Hyponatraemia
e)
Hyperglycaemia
13.
A patient with acute decompensated heart failure is admitted to the Acute Medical Unit. They are severely breathless and have significant bilateral pitting oedema. The registrar prescribes a potent intravenous diuretic for rapid relief. What is the generic name of the diuretic most likely administered?
a)
Bumetanide
b)
Furosemide
c)
Spironolactone
d)
Hydrochlorothiazide
e)
Mannitol
14.
A drug information leaflet describes a medication that acts on the thick ascending limb of the loop of Henle to inhibit a specific transporter, leading to a rapid and profound increase in urine output. This drug belongs to which class?
a)
Thiazide diuretic
b)
Loop diuretic
c)
Potassium-sparing diuretic
d)
Osmotic diuretic
e)
Vasopressin antagonist
15.
A patient with heart failure is prescribed furosemide and digoxin. The house officer is asked to monitor blood tests closely, with specific attention to one electrolyte abnormality that could increase the risk of digoxin toxicity. Inhibition of which transporter by furosemide directly leads to the loss of this critical electrolyte?
a)
Na+/Cl- cotransporter (DCT)
b)
Epithelial Sodium Channel (ENaC)
c)
Na+/K+/2Cl- cotransporter (TAL)
d)
NaCl co-transporter (DCT)
e)
Aquaporin-2 channel
16.
In a patient with acute pulmonary oedema, intravenous furosemide often produces symptomatic relief of breathlessness before a significant diuresis has occurred. What is the proposed immediate mechanism for this early benefit?
a)
Inotropic stimulation of the myocardium
b)
Bronchodilation
c)
Systemic venodilation reducing preload
d)
Arteriolar vasoconstriction increasing afterload
e)
Reduction of pulmonary capillary permeability
17.
A 45-year-old man is brought to A&E following a seizure. Blood tests reveal a corrected calcium level of 3.6 mmol/L. He is rehydrated with intravenous saline. Which diuretic could be used as an adjunct to intravenous fluids to promote calcium excretion in this patient with severe hypercalcaemia?
a)
Hydrochlorothiazide
b)
Spironolactone
c)
Furosemide
d)
Amiloride
e)
Acetazolamide
18.
An elderly patient on high-dose oral furosemide for chronic heart failure complains of difficulty hearing and a constant ringing in his ears, which started shortly after his dose was increased. This symptom is indicative of which adverse effect, particularly associated with rapid intravenous administration or high doses?
a)
Peripheral neuropathy
b)
Pancreatitis
c)
Ototoxicity
d)
Hyperuricaemia
e)
Stevens-Johnson syndrome
19.
A 58-year-old woman with refractory ascites due to alcoholic liver cirrhosis is being managed in the hepatology clinic. Her doctor adds a specific oral diuretic to her regimen, explaining it will help reduce her fluid retention by acting as an antagonist to a certain hormone. What is the generic name of the medication most likely prescribed?
a)
Furosemide
b)
Hydrochlorothiazide
c)
Spironolactone
d)
Amiloride
e)
Metolazone
20.
A pharmacology revision note states: "This drug competitively binds to intracellular receptors in the collecting duct principal cells, preventing gene transcription normally induced by a mineralocorticoid hormone." This describes the mechanism of which class of drugs?
a)
Loop diuretics
b)
Thiazide diuretics
c)
Potassium-sparing diuretics
d)
Osmotic diuretics
e)
Carbonic anhydrase inhibitors
21.
A patient with heart failure is prescribed spironolactone alongside an ACE inhibitor and a loop diuretic. The team warns of a dangerous interaction requiring close electrolyte monitoring. Concurrent use of these medications significantly increases the risk of which electrolyte abnormality due to their combined effects on renal tubules?
a)
Hypokalaemia
b)
Hyperkalaemia
c)
Hyponatraemia
d)
Hypomagnesaemia
e)
Hypercalcaemia
22.
A research study investigates a drug that improves outcomes in severe heart failure. The proposed benefit is not solely due to diuresis, but also from blocking the deleterious effects of aldosterone on cardiac fibrosis and remodelling. Through which primary molecular mechanism does spironolactone exert this cardioprotective effect?
a)
Inhibition of the Na+/K+/2Cl- cotransporter
b)
Blockade of L-type calcium channels
c)
Competitive antagonism of intracellular mineralocorticoid receptors
d)
Inhibition of angiotensin-converting enzyme
e)
Opening of ATP-sensitive potassium channels
23.
A 65-year-old man with chronic heart failure with reduced ejection fraction (HFrEF), already on an ACE inhibitor, beta-blocker, and furosemide, remains symptomatic (NYHA Class III). His specialist decides to add a fourth evidence-based therapy. For which of the following is spironolactone specifically indicated as a disease-modifying treatment?
a)
First-line monotherapy for essential hypertension
b)
Reducing mortality in symptomatic (NYHA Class II-IV) heart failure with reduced ejection fraction (HFrEF)
c)
Acute treatment of hypertensive emergencies
d)
Management of nephrogenic diabetes insipidus
e)
Primary treatment for bilateral leg oedema
24.
A 45-year-old man taking spironolactone for resistant hypertension complains of bilateral breast tenderness and enlargement. On examination, he has mild gynaecomastia. This adverse effect is a result of spironolactone's activity at which other class of receptors?
a)
Glucocorticoid receptors
b)
Thyroid hormone receptors
c)
Androgen receptors
d)
Oestrogen receptors
e)
Progesterone receptors
25.
A patient with stable angina and hypertension is prescribed a once-daily calcium channel blocker. His GP advises that a common side effect is ankle swelling, but this is not a sign of heart failure and to continue the medication unless it becomes severe. Which of the following is the generic name of the medication most likely prescribed?
a)
Verapamil
b)
Diltiazem
c)
Nifedipine
d)
Amlodipine
e)
Felodipine
26.
A medical student learns about a drug that selectively blocks L-type calcium channels on vascular smooth muscle, causing peripheral vasodilation with minimal effect on cardiac conduction or contractility at therapeutic doses. This drug is best classified as which type of calcium channel blocker?
a)
Phenylalkylamine (e.g., verapamil)
b)
Benzothiazepine (e.g., diltiazem)
c)
Dihydropyridine (e.g., amlodipine)
d)
Non-dihydropyridine
e)
Cardiac-selective
27.
A patient on amlodipine for hypertension is started on clarithromycin for a chest infection. He is readmitted a few days later with severe hypotension and lightheadedness. This interaction is most likely due to clarithromycin inhibiting the cytochrome P450 system responsible for metabolising amlodipine, leading to increased drug levels. Which CYP enzyme is primarily involved?
a)
CYP1A2
b)
CYP2C9
c)
CYP3A4
d)
CYP2D6
e)
CYP2C19
28.
A patient's hypertension improves after starting amlodipine. The mechanism involves reducing the entry of calcium ions into cells. What is the primary physiological consequence of this blockade in vascular smooth muscle cells?
a)
Increased myosin light chain phosphatase activity
b)
Reduced activation of myosin light chain kinase, causing relaxation
c)
Hyperpolarisation via opening of potassium channels
d)
Inhibition of angiotensin II synthesis
e)
Increased synthesis of nitric oxide
29.
A 70-year-old woman of Black African-Caribbean origin is diagnosed with hypertension. Her GP follows NICE guidelines and chooses a first-line pharmacological treatment suitable for her demographic. For which of the following patients is amlodipine specifically indicated as a first-line agent according to UK NICE guidelines?
a)
A 40-year-old Caucasian man as first-choice monotherapy.
b)
A patient over 55, or of any age of Black African/Caribbean family origin, as first-choice monotherapy (Step 1).
c)
A patient with asthma as first-line over a beta-blocker.
d)
A patient with heart failure with reduced ejection fraction (HFrEF) to improve symptoms.
e)
A patient with Prinzmetal's (variant) angina.
30.
A patient on amlodipine 10mg daily for hypertension attends a follow-up appointment. He reports significant bilateral pitting oedema of his ankles and lower legs, but denies breathlessness or orthopnoea. His cardiovascular examination is otherwise normal. What is the most likely cause of this oedema?
a)
Right ventricular failure
b)
Nephrotic syndrome
c)
Precapillary arteriolar dilation with intracapillary hypertension
d)
Hyperaldosteronism induced by the drug
e)
An allergic reaction
31.
A woman at 32 weeks gestation is diagnosed with pre-eclampsia. Her blood pressure is 155/100 mmHg. The obstetric team prescribes an oral antihypertensive agent known for its rapid onset of action, advising the patient it may be placed under her tongue for faster absorption if needed. Which of the following is the generic name of the medication most likely prescribed?
a)
Labetalol
b)
Methyldopa
c)
Nifedipine
d)
Hydralazine
e)
Amlodipine
32.
A pharmacology exam asks students to identify a calcium channel blocker that is a dihydropyridine, has high vascular selectivity, and is available in both short-acting and long-acting modified-release formulations. Which drug fits this description?
a)
Verapamil
b)
Diltiazem
c)
Nifedipine
d)
Nicardipine
e)
Isradipine
33.
A patient with hypertension is prescribed a modified-release nifedipine tablet. The pharmacist advises them to swallow the tablet whole and not to crush or chew it. This formulation is designed to prevent which undesirable pharmacodynamic effect associated with the rapid release of a high drug concentration?
a)
Hyperglycaemia
b)
Reflex tachycardia and acute hypotension
c)
Hyperkalaemia
d)
Bradycardia
e)
QT prolongation
34.
In Raynaud's phenomenon, nifedipine is used to reduce the frequency and severity of vasospastic attacks in the digital arteries. What is the primary mechanism by which nifedipine achieves this therapeutic effect?
a)
Alpha-1 adrenergic receptor blockade
b)
Inhibition of voltage-gated calcium influx into vascular smooth muscle
c)
Increased production of local prostaglandins
d)
Central suppression of sympathetic outflow
e)
Beta-2 adrenergic receptor agonism
35.
A 28-year-old woman presents with episodes of painful, cold, and discoloured fingers triggered by cold weather or stress. She is diagnosed with primary Raynaud's phenomenon that is impacting her quality of life. For which of the following is a calcium channel blocker like nifedipine specifically indicated?
a)
First-line treatment for chronic stable angina.
b)
Prophylactic treatment for vasospastic disorders like Raynaud's phenomenon.
c)
Rate control in acute atrial fibrillation.
d)
Management of heart failure with preserved ejection fraction (HFpEF).
e)
Secondary prevention following a myocardial infarction.
36.
A patient started on immediate-release nifedipine capsules for hypertension complains of severe headaches, facial flushing, and feeling dizzy shortly after taking each dose. Which of the following is the most likely class-specific adverse effect of a short-acting dihydropyridine like nifedipine, mediated by rapid vasodilation?
a)
Cough
b)
Bradycardia
c)
Reflex tachycardia with palpitations
d)
Hyperkalaemia
e)
Lupus-like syndrome
37.
A 65-year-old man with known stable angina is seen in clinic. He describes using a spray that he is instructed to use under his tongue at the onset of chest pain, which provides relief within 1-2 minutes. He carries it with him at all times. What is the generic name of the medication in this spray?
a)
Isosorbide mononitrate
b)
Isosorbide dinitrate
c)
Glyceryl trinitrate (GTN)
d)
Verapamil
e)
Nicorandil
38.
A drug is described as an exogenous source of nitric oxide (NO), which causes venodilation and some arteriolar dilation, reducing cardiac preload and afterload. It has a very short half-life. This drug belongs to which class?
a)
Beta-blockers
b)
Calcium channel blockers
c)
Potassium channel activators
d)
Organic nitrates
e)
Angiotensin-converting enzyme inhibitors
39.
A patient with angina is prescribed GTN spray. He is also taking sildenafil for erectile dysfunction. He is sternly warned never to take these medications within 24 hours of each other. This dangerous interaction can cause severe, refractory hypotension because both drugs lead to an excessive and unopposed increase in which intracellular second messenger?
a)
Inositol trisphosphate (IP3)
b)
Diacylglycerol (DAG)
c)
Cyclic guanosine monophosphate (cGMP)
d)
Cyclic adenosine monophosphate (cAMP)
e)
Intracellular calcium
40.
The rapid relief of angina by sublingual GTN is primarily due to a reduction in myocardial oxygen demand rather than an increase in coronary blood flow. Which of the following is the principal hemodynamic effect responsible for this reduction in oxygen demand?
a)
Increased heart rate
b)
Increased cardiac contractility
c)
Coronary artery vasodilation
d)
Reduction in left ventricular preload
e)
Reduction in systemic vascular resistance (afterload)
41.
A 58-year-old man experiences crushing central chest pain at rest, lasting 20 minutes. In the emergency department, his ECG shows ST-segment elevation in the anterior leads. While awaiting primary percutaneous coronary intervention (PPCI), he is given oxygen, aspirin, and a sublingual vasodilator. What is the role of GTN in this acute setting?
a)
To lyse the coronary thrombus
b)
To provide long-term secondary prevention
c)
To provide symptomatic relief of ischaemic pain and reduce preload
d)
To prevent ventricular arrhythmias
e)
To reduce platelet aggregation
42.
A patient uses his GTN spray for the first time during an angina attack. Shortly after administration, he experiences a severe throbbing headache and feels lightheaded. What is the most common, self-limiting adverse effect of nitrates like GTN, caused by vasodilation of cranial arteries?
a)
Bradycardia
b)
Cough
c)
Headache
d)
Hyperkalaemia
e)
Ankle oedema
43.
A patient with chronic stable angina is prescribed a long-acting nitrate to prevent attacks. The doctor explains it must be taken once or twice daily but requires a "nitrate-free interval" to prevent tolerance. Which of the following is the generic name of this prophylactic medication?
a)
Glyceryl trinitrate
b)
Isosorbide dinitrate
c)
Isosorbide mononitrate
d)
Nicorandil
e)
Ranolazine
44.
A drug guide lists a medication that is an active metabolite of isosorbide dinitrate, with a longer half-life, used for the prophylactic treatment of angina pectoris. This medication belongs to which class of antianginal drugs?
a)
Beta-blockers
b)
Calcium channel blockers
c)
Organic nitrates
d)
Sodium channel blockers
e)
If channel inhibitors
45.
A patient on isosorbide mononitrate experiences severe dizziness and syncope shortly after starting a new medication for erectile dysfunction prescribed by his GP. The dangerous interaction is due to the new medication inhibiting the breakdown of the second messenger activated by the nitrate. What is the name of this dangerous drug class?
a)
Alpha-blockers
b)
Phosphodiesterase type 5 inhibitors (e.g., sildenafil)
c)
Calcium channel blockers
d)
Nitric oxide synthase inhibitors
e)
Beta-agonists
46.
A patient is advised to take his isosorbide mononitrate in the morning and early afternoon, ensuring a gap of over 12 hours before the next dose to maintain efficacy. What is the primary pharmacodynamic reason for scheduling doses to create a daily "nitrate-free interval"?
a)
To reduce the risk of headaches
b)
To prevent cytochrome P450 enzyme induction
c)
To avoid the development of pharmacological tolerance
d)
To minimise the risk of reflex tachycardia
e)
To improve gastrointestinal absorption
47.
A 70-year-old woman with chronic stable angina, already on a beta-blocker and a statin, continues to experience several episodes of chest pain per week. Her cardiologist adds a second antianginal agent. For which of the following is isosorbide mononitrate most appropriately prescribed?
a)
Immediate relief of an acute angina attack while it is happening.
b)
Prophylactic reduction in the frequency and severity of angina attacks.
c)
Rate control in atrial fibrillation.
d)
Treatment of hypertensive emergency.
e)
Primary prevention of myocardial infarction.
48.
A patient starting isosorbide mononitrate reports persistent, throbbing headaches that occur about an hour after each dose. He is otherwise well, with a normal blood pressure. What is the best initial advice regarding this very common, class-specific adverse effect?
a)
Stop the medication immediately and seek urgent medical attention.
b)
Take an opioid analgesic with each dose to prevent the pain.
c)
The headaches often diminish in severity with continued therapy.
d)
Switch to a calcium channel blocker immediately.
e)
This indicates cerebral haemorrhage and requires a CT scan.
49.
A 55-year-old diabetic man with microalbuminuria is started on an ACE inhibitor to protect his kidneys. His GP advises him to have blood tests for renal function and potassium in 1-2 weeks and warns him about a possible dry cough. Which of the following is the generic name of a commonly prescribed ACE inhibitor?
a)
Losartan
b)
Candesartan
c)
Ramipril
d)
Spironolactone
e)
Eplerenone
50.
A patient's medication list includes a drug that inhibits the conversion of angiotensin I to angiotensin II, leading to vasodilation, reduced aldosterone secretion, and increased bradykinin levels. This drug belongs to which class?
a)
Angiotensin II receptor blockers (ARBs)
b)
Direct renin inhibitors
c)
Angiotensin-converting enzyme inhibitors (ACE inhibitors)
d)
Beta-blockers
e)
Calcium channel blockers
51.
A patient with heart failure is started on ramipril. One week later, he is admitted with vomiting, diarrhoea, and acute kidney injury. His medication history reveals he has also been taking a high-dose non-steroidal anti-inflammatory drug (NSAID) for back pain. This acute kidney injury is primarily due to the combined pharmacological effect of these drugs on which aspect of renal physiology?
a)
Inhibition of the Na+/K+/2Cl- cotransporter
b)
Dilation of the efferent arteriole and inhibition of afferent arteriolar dilation
c)
Direct tubular toxicity
d)
Induction of renal artery stenosis
e)
Excessive renin secretion
52.
A patient with a history of myocardial infarction is prescribed ramipril indefinitely. The benefit is partly attributed to the drug's effect on preventing deleterious cardiac remodelling. This cardioprotective effect is primarily due to the reduction of which peptide, whose levels are increased by ramipril's primary enzymatic inhibition?
a)
Aldosterone
b)
Angiotensin II
c)
Bradykinin
d)
Atrial natriuretic peptide
e)
Endothelin-1
53.
A 60-year-old man with no prior cardiovascular disease is found to have an asymptomatic abdominal aortic aneurysm (AAA) of 4.5cm on screening. He is a non-smoker with normal blood pressure. According to UK guidelines, for which of the following should ramipril be prescribed to reduce cardiovascular events?
a)
All patients with an AAA regardless of size.
b)
Patients with established atherosclerotic cardiovascular diseaseto prevent further events.
c)
First-line therapy for all patients over 60 with isolated systolic hypertension.
d)
Primary treatment for acute heart failure.
e)
To reduce the growth rate of small AAAs in all patients.
54.
A patient started on ramipril two weeks ago contacts her GP complaining of a persistent, irritating, dry cough that is worse at night. Examination of her chest is clear. What is the most likely cause of this common, class-specific adverse effect?
a)
Interstitial pneumonitis
b)
Accumulation of bradykinin and substance P in the airways
c)
Angioedema of the larynx
d)
Pulmonary fibrosis
e)
ACE inhibitor-induced asthma
55.
A 58-year-old man with heart failure is started on an ACE inhibitor. His GP prescribes a once-daily tablet and advises that, unlike some other drugs in its class, it does not require dose adjustment for liver impairment as it is not metabolised hepatically. Which of the following ACE inhibitors fits this description?
a)
Enalapril
b)
Ramipril
c)
Perindopril
d)
Lisinopril
e)
Captopril
56.
A patient is prescribed a medication for hypertension that can cause a persistent dry cough and carries a risk of angioedema. It is contraindicated in pregnancy due to teratogenic effects. These characteristics are classic for which class of drugs?
a)
Beta-blockers
b)
Calcium channel blockers
c)
Thiazide diuretics
d)
Angiotensin-converting enzyme (ACE) inhibitors
e)
Angiotensin II receptor blockers (ARBs)
57.
An elderly patient on lisinopril is admitted with acute kidney injury and hyperkalaemia. His medication history includes a newly prescribed diuretic for leg swelling. Concurrent use of lisinopril with which of the following diuretics poses the highest risk of this presentation due to synergistic effects on potassium handling?
a)
Furosemide
b)
Bendroflumethiazide
c)
Spironolactone
d)
Indapamide
e)
Metolazone
58.
A patient with diabetic nephropathy is started on lisinopril. The intended renal protective effect is mediated not only by lowering blood pressure but also by reducing intraglomerular pressure. How does lisinopril primarily reduce intraglomerular pressure?
a)
Constriction of the afferent arteriole
b)
Dilation of the efferent arteriole
c)
Direct reduction in renin secretion
d)
Inhibition of tubular sodium reabsorption
e)
Increased production of renal prostaglandins
59.
A 50-year-old man with type 2 diabetes and hypertension is found to have microalbuminuria on annual screening. His GP starts a medication to slow the progression of diabetic kidney disease. For which of the following is an ACE inhibitor like lisinopril a first-line, evidence-based treatment?
a)
Symptomatic relief of angina pectoris
b)
Slowing the progression of diabetic nephropathy, even in normotensive patients
c)
Acute management of hypertensive crisis
d)
Primary prevention of gout
e)
Treatment of heart failure with preserved ejection fraction (HFpEF) to improve mortality
60.
A patient commenced on lisinopril one month ago presents to the emergency department with acute swelling of the lips, tongue, and floor of the mouth. He is struggling to speak clearly. What is this life-threatening, class-specific adverse reaction called, and what is the critical immediate management step regarding the drug?
a)
Stevens-Johnson syndrome; switch to an ARB.
b)
Anaphylaxis; administer adrenaline and continue lisinopril if needed.
c)
Angioedema; discontinue lisinopril immediately and never re-challenge.
d)
Serum sickness; treat with corticosteroids.
e)
DRESS syndrome; stop the drug and monitor.
61.
A patient with heart failure develops a persistent dry cough on lisinopril. Her cardiologist switches her to a different drug that works on the same physiological system but has a lower incidence of this side effect. Which of the following is a generic name for a drug in the class most likely prescribed as an alternative?
a)
Aliskiren
b)
Candesartan
c)
Sacubitril
d)
Spironolactone
e)
Hydralazine
62.
A pharmacology tutorial describes a drug that selectively blocks the AT1 receptor, preventing angiotensin II from causing vasoconstriction, aldosterone release, and cardiac remodelling, without increasing bradykinin levels. This describes which class of drugs?
a)
ACE inhibitors
b)
Angiotensin II receptor blockers (ARBs)
c)
Direct renin inhibitors
d)
Beta-blockers
e)
Calcium channel blockers
63.
A patient with hypertension is stable on candesartan. He is then prescribed a high-dose NSAID for severe osteoarthritis. His GP schedules a renal function and electrolyte check for 1 week later. What is the primary shared renal risk from combining an ARB like candesartan with an NSAID?
a)
Hypernatraemia
b)
Acute kidney injury
c)
Hypokalaemia
d)
Nephrogenic diabetes insipidus
e)
Renal tubular acidosis
64.
Candesartan is prescribed for a patient with heart failure. A key part of its benefit is blocking the effects of angiotensin II produced via pathways not inhibited by ACE inhibitors (e.g., chymase). At which specific site does candesartan act to achieve this more complete blockade?
a)
The catalytic site of angiotensin-converting enzyme
b)
The mineralocorticoid receptor
c)
The angiotensin II type 1 (AT1) receptor
d)
The renin enzyme
e)
The aldosterone synthase enzyme
65.
A patient is diagnosed with heart failure with reduced ejection fraction (HFrEF) but has a history of recurrent angioedema, making ACE inhibitors contraindicated. According to major guidelines, for which of the following should an ARB like candesartan be used?
a)
First-line treatment over ACE inhibitors in all new HFrEF.
b)
As an alternative to an ACE inhibitor in HFrEF when an ACE inhibitor is not tolerated.
c)
In combination with an ACE inhibitor for added mortality benefit in HFrEF.
d)
First-line treatment for hypertensive emergencies.
e)
To prevent migraine headaches.
66.
A patient recently switched from lisinopril to candesartan due to a cough reports that the cough has resolved. However, at her 3-month review, her blood tests reveal a serum potassium of 5.8 mmol/L. Which of the following is a shared class adverse effect of both ACE inhibitors and ARBs like candesartan that explains this finding?
a)
Hypokalaemia
b)
Hyperkalaemia
c)
Hypocalcaemia
d)
Hypomagnesaemia
e)
Hypernatraemia
67.
A medical student learns about an ARB that has a relatively short half-life but is metabolised to an active metabolite (EXP-3174) that is responsible for most of its pharmacological effect. Which ARB is described?
a)
Valsartan
b)
Losartan
c)
Irbesartan
d)
Telmisartan
e)
Olmesartan
68.
A patient is prescribed a drug for hypertension that is specifically noted to have a uricosuric effect, which may be beneficial in patients with comorbid gout or hyperuricaemia. This additional property is a distinguishing feature of which specific drug within the ARB class?
a)
Candesartan
b)
Valsartan
c)
Losartan
d)
Telmisartan
e)
Olmesartan
69.
A patient on losartan for hypertension is started on fluconazole for a fungal infection. His blood pressure control deteriorates. What is the likely pharmacokinetic explanation, given fluconazole is a potent inhibitor of cytochrome P450 2C9 (CYP2C9)?
a)
Increased renal excretion of losartan
b)
Reduced conversion of losartan to its active metabolite
c)
Induction of losartan metabolism
d)
Displacement of losartan from plasma proteins
e)
Reduced absorption of losartan
70.
Losartan's action at the AT1 receptor is competitive and reversible. However, its long-lasting effect is largely due to the properties of its metabolite. What is a key characteristic of losartan's active metabolite, EXP-3174, compared to the parent drug?
a)
It is a weaker AT1 receptor antagonist.
b)
It has a much shorter half-life.
c)
It binds to the AT1 receptor insurmountably (non-competitively).
d)
It acts primarily as a beta-blocker.
e)
It is a potent ACE inhibitor.
71.
A 65-year-old man with hypertension and a history of recurrent gout attacks is being started on an antihypertensive. His GP wishes to choose an agent from the RAAS-blocking class that might have a beneficial effect on his serum uric acid. For this specific patient profile, which ARB might be preferred over others in its class?
a)
Valsartan for its longest half-life.
b)
Telmisartan for its PPAR-gamma activity.
c)
Losartan for its uricosuric effect.
d)
Candesartan for its proven heart failure benefit.
e)
Irbesartan for its renal protection data.
72.
A patient with diabetes and nephropathy is started on losartan for renoprotection. At his follow-up, his serum potassium is elevated to 5.7 mmol/L. What is the primary mechanism by which losartan, like other ARBs, can cause hyperkalaemia?
a)
Direct inhibition of the renal Na+/K+ ATPase pump
b)
Reduction in aldosterone secretion secondary to AT1 receptor blockade
c)
Induction of renal tubular acidosis
d)
Direct toxic effect on the adrenal gland
e)
Excessive dietary potassium intake encouraged by the drug
73.
An elderly man with hypertension also reports bothersome urinary symptoms, including hesitancy and a weak stream, suggestive of benign prostatic hyperplasia (BPH). His GP prescribes a single medication intended to address both conditions. Which of the following medications, known for causing "first-dose syncope," is most likely prescribed?
a)
Tamsulosin
b)
Doxazosin
c)
Finasteride
d)
Lisinopril
e)
Amlodipine
74.
A drug information sheet describes a medication that causes vasodilation and smooth muscle relaxation in the prostate and bladder neck by blocking sympathetic alpha-1 adrenoceptors. This drug belongs to which class?
a)
Beta-blockers
b)
Calcium channel blockers
c)
Alpha-blockers
d)
ACE inhibitors
e)
5-alpha reductase inhibitors
75.
A patient on doxazosin for BPH is prescribed sildenafil for erectile dysfunction. He is warned about a potential interaction. What is the primary concern when combining these two vasodilator drugs?
a)
Hyperkalaemia
b)
Acute kidney injury
c)
Severe postural hypotension and syncope
d)
Bradycardia
e)
Priapism
76.
Doxazosin provides rapid relief of urinary obstructive symptoms in BPH before any reduction in prostate size occurs. What is the mechanism for this rapid symptomatic benefit?
a)
Inhibition of dihydrotestosterone (DHT) synthesis
b)
Relaxation of smooth muscle in the prostate capsule and bladder neck via alpha-1 blockade
c)
Reduction of prostatic inflammation
d)
Diuresis reducing bladder pressure
e)
Increased bladder contractility
77.
A patient with resistant hypertension is already on an ACE inhibitor, a calcium channel blocker, and a thiazide diuretic. A fourth agent is required. In which of the following scenarios is doxazosin specifically indicated as an add-on antihypertensive agent?
a)
First-line monotherapy for a young, fit patient.
b)
As a fourth-line agent in resistant hypertension (according to NICE guidelines).
c)
First-line treatment for hypertension in pregnancy.
d)
Primary treatment for a hypertensive emergency.
e)
To reduce mortality in heart failure with reduced ejection fraction.
78.
A patient takes his first dose of doxazosin 1mg in the evening. Several hours later, he gets up to use the bathroom and experiences sudden dizziness, nearly fainting. His blood pressure is low. What is this characteristic, dose-related adverse effect called?
a)
Raynaud's phenomenon
b)
Hypertensive crisis
c)
First-dose hypotension (or "first-dose syncope")
d)
Serotonin syndrome
e)
Neuroleptic malignant syndrome
79.
An 80-year-old woman with atrial fibrillation and heart failure is admitted with nausea, confusion, and yellow-green visual disturbances (xanthopsia). Her medication list includes a drug with a narrow therapeutic index that she has taken for years. Which medication is most likely responsible for this presentation?
a)
Metoprolol
b)
Digoxin
c)
Furosemide
d)
Amiodarone
e)
Warfarin
80.
A drug derived from the foxglove plant (Digitalis lanata) increases cardiac contractility and slows atrioventricular (AV) nodal conduction. This drug belongs to which class?
a)
Beta-blockers
b)
Calcium channel blockers
c)
Cardiac glycosides
d)
Class III antiarrhythmics
e)
Phosphodiesterase inhibitors
81.
A patient on stable digoxin therapy is started on a loop diuretic for worsening leg oedema. One week later, they present with symptoms suggestive of digoxin toxicity. Which electrolyte disturbance, commonly caused by the loop diuretic, predisposes to digoxin toxicity by enhancing its binding to its target enzyme?
a)
Hypernatraemia
b)
Hypokalaemia
c)
Hypercalcaemia
d)
Hypomagnesaemia
e)
Hyperuricaemia
82.
A student learns that digoxin's inotropic effect is indirect, resulting from increased intracellular calcium availability during cardiac contraction. What is digoxin's primary molecular mechanism that leads to this increased intracellular calcium?
a)
Blockade of L-type calcium channels
b)
Activation of beta-1 adrenergic receptors
c)
Inhibition of the Na+/K+ ATPase pump, leading to increased intracellular Na+ and subsequent decreased Ca2+ extrusion via Na+/Ca2+ exchanger
d)
Inhibition of phosphodiesterase III
e)
Opening of ryanodine receptors on the sarcoplasmic reticulum
83.
A patient with symptomatic heart failure with reduced ejection fraction (HFrEF), already on an ACE inhibitor, beta-blocker, and MRA, remains in NYHA class III. The specialist considers adding a fourth drug for symptom control. In which of the following is digoxin specifically indicated according to modern heart failure guidelines?
a)
First-line rate control in new-onset atrial fibrillation.
b)
To reduce hospitalisations in symptomatic HFrEF (NYHA II-IV) despite optimal guideline-directed medical therapy.
c)
Primary treatment for acute decompensated heart failure.
d)
To improve mortality in all patients with heart failure.
e)
First-line treatment for supraventricular tachycardia in Wolff-Parkinson-White syndrome.
84.
A patient on digoxin presents with a pulse of 42 bpm and is found to have a regular bradycardia. An ECG shows features suggestive of increased vagal tone and delayed AV conduction. Which of the following is a classic digoxin-toxic arrhythmia that can also present with bradycardia?
a)
Monomorphic ventricular tachycardia
b)
Atrial fibrillation with rapid ventricular response
c)
Sinus bradycardia or AV block (e.g., Wenckebach)
d)
Torsades de pointes
e)
Supraventricular tachycardia
85.
A patient with severe heart failure and renal impairment is admitted with pulmonary oedema. The medical team chooses a potent loop diuretic to be given intravenously. They note it has a shorter duration of action but greater bioavailability than furosemide. Which loop diuretic is most likely being described?
a)
Furosemide
b)
Bumetanide
c)
Torasemide
d)
Spironolactone
e)
Hydrochlorothiazide
86.
A diuretic acts on the thick ascending limb of the loop of Henle, causing profound natriuresis and increasing the excretion of calcium and magnesium. This drug is a member of which class?
a)
Thiazide diuretics
b)
Loop diuretics
c)
Potassium-sparing diuretics
d)
Osmotic diuretics
e)
Carbonic anhydrase inhibitors
87.
A patient on high-dose intravenous bumetanide is also receiving gentamicin for a severe infection. The team is vigilant for a specific ototoxic adverse effect. What is the primary concern when combining these two drugs?
a)
Additive hyperkalaemia
b)
Additive ototoxicity (hearing loss/tinnitus)
c)
Enhanced nephrotoxicity
d)
Reduced diuretic efficacy
e)
Precipitation of gout
88.
Bumetanide is effective even in patients with significant renal impairment, unlike some other classes of diuretics. What is the primary reason for its maintained efficacy in renal failure?
a)
It acts as a prodrug activated in the kidney.
b)
It acts from within the lumen on the Na+/K+/2Cl- cotransporter.
c)
It works primarily by systemic vasodilation.
d)
It inhibits carbonic anhydrase throughout the nephron.
e)
Its action is independent of glomerular filtration rate.
89.
A patient with acute decompensated heart failure and significant peripheral oedema is not responding adequately to high-dose oral furosemide. Which of the following is a standard indication for switching to or using intravenous bumetanide?
a)
First-line treatment for hypertension
b)
Long-term prophylaxis for angina
c)
Management of severe fluid overload states (e.g., pulmonary oedema, anasarca) refractory to oral therapy
d)
Treatment of syndrome of inappropriate antidiuretic hormone secretion (SIADH)
e)
Prevention of contrast-induced nephropathy
90.
A patient on chronic high-dose bumetanide presents with severe muscle cramps and weakness. An ECG shows flattened T-waves and prominent U-waves. Which electrolyte disturbance, common to all loop diuretics, is the most likely cause?
a)
Hypercalcaemia
b)
Hypokalaemia
c)
Hyponatraemia
d)
Hypernatraemia
e)
Hypophosphataemia
91.
A 62-year-old man post-myocardial infarction is started on a beta-blocker for secondary prevention. The GP chooses a once-daily, cardioselective agent and advises it will also help manage his comorbid hypertension and anxiety-related palpitations. Which of the following beta-blockers is most likely prescribed?
a)
Propranolol
b)
Atenolol
c)
Bisoprolol
d)
Carvedilol
e)
Labetalol
92.
A drug is described as a competitive antagonist at beta-1 adrenergic receptors, reducing heart rate, contractility, and renin release, with minimal effect on beta-2 receptors at low doses. This profile is characteristic of which type of beta-blocker?
a)
Non-selective beta-blocker
b)
Beta-1 selective (cardioselective) beta-blocker
c)
Alpha and beta-blocker
d)
Intrinsic sympathomimetic activity (ISA) beta-blocker
e)
Lipid-soluble beta-blocker
93.
A patient with HFrEF on bisoprolol, ramipril, and spironolactone is admitted with symptomatic bradycardia (HR 38 bpm) and hypotension. He recently started a new medication for neuropathic pain. Which of the following drugs, known to inhibit cardiac conduction, could have an additive bradycardic effect with bisoprolol?
a)
Ibuprofen
b)
Amitriptyline
c)
Omeprazole
d)
Simvastatin
e)
Levothyroxine
94.
In heart failure with reduced ejection fraction, bisoprolol is started at a very low dose and titrated up slowly over weeks. What is the primary long-term beneficial mechanism of bisoprolol in HFrEF that justifies this careful uptitration?
a)
Immediate positive inotropic effect
b)
Antagonism of the deleterious effects of chronic sympathetic nervous system activation on the myocardium
c)
Primary vasodilation to reduce afterload
d)
Induction of diuresis
e)
Inhibition of the renin-angiotensin system directly
95.
A patient is diagnosed with symptomatic heart failure with reduced ejection fraction (HFrEF). After starting an ACE inhibitor, the next evidence-based medication to be initiated is a specific class of drug, titrated from a low dose. For which of the following is bisoprolol specifically a first-line, disease-modifying treatment?
a)
Rate control in acute atrial fibrillation with haemodynamic instability.
b)
Management of chronic heart failure with reduced ejection fraction (HFrEF) to reduce mortality and hospitalisation.
c)
First-line monotherapy for hypertension in a young, anxious patient.
d)
Primary prophylaxis for migraine.
e)
Treatment of thyrotoxicosis to control symptoms.
96.
A patient with asthma and HFrEF is started on a low dose of bisoprolol. Two days later, he presents with increased wheeze and shortness of breath. What is the most likely cause, given the drug's pharmacology?
a)
Anaphylactic reaction
b)
Loss of beta-1 selectivity at this dose or individual sensitivity
c)
Pulmonary oedema from fluid retention
d)
Drug-induced interstitial lung disease
e)
Exacerbation of COPD
97.
A patient with hypercholesterolaemia is started on a statin. He is advised to take it in the evening and is specifically warned to avoid grapefruit juice. He is also told to report any unexplained muscle pain. Which of the following statins is most associated with these specific instructions?
a)
Atorvastatin
b)
Simvastatin
c)
Pravastatin
d)
Rosuvastatin
e)
Fluvastatin
98.
A drug used for primary and secondary prevention of cardiovascular disease works by competitively inhibiting the rate-limiting enzyme in hepatic cholesterol synthesis. This drug belongs to which class?
a)
Fibrates
b)
Bile acid sequestrants
c)
Ezetimibe
d)
Statins (HMG-CoA reductase inhibitors)
e)
PCSK9 inhibitors
99.
A patient on simvastatin 40mg is prescribed a macrolide antibiotic for a chest infection. The pharmacist intervenes, recommending a change to a different antibiotic or a temporary hold on the statin. This is primarily due to the antibiotic's potent inhibition of which cytochrome P450 enzyme, risking severe myotoxicity?
a)
CYP1A2
b)
CYP2C9
c)
CYP3A4
d)
CYP2D6
e)
CYP2C19
100.
The primary goal of statin therapy is to lower LDL cholesterol. This is achieved not only by reducing cholesterol synthesis but also by a compensatory increase in hepatic LDL receptor activity. How does simvastatin-induced inhibition of HMG-CoA reductase lead to this upregulation of LDL receptors?
a)
By directly binding to the LDL receptor gene promoter
b)
By reducing intracellular cholesterol concentration, which derepresses SREBP-mediated transcription of LDL receptor genes
c)
By increasing hepatic excretion of cholesterol into bile
d)
By inhibiting PCSK9 binding to the LDL receptor
e)
By promoting cholesterol efflux from macrophages
101.
A 60-year-old man with type 2 diabetes but no prior cardiovascular events has an LDL cholesterol of 3.8 mmol/L. His 10-year QRISK3 score is 15%. According to UK NICE guidelines, for which of the following should simvastatin 20mg be offered?
a)
All adults over 50 for primary prevention.
b)
Primary prevention in adults with a 10-year CVD risk ≥10% (as per NICE CG181).
c)
Secondary prevention only, following an MI.
d)
To treat hypertriglyceridaemia as first-line therapy.
e)
To reduce proteinuria in diabetic nephropathy.
102.
A patient on high-dose simvastatin presents with symmetrical pain and tenderness in his thigh and shoulder muscles. His creatinine kinase (CK) level is moderately elevated at 1,200 U/L. What is this statin-related adverse effect called, which can progress to a life-threatening condition?
a)
Hepatotoxicity
b)
Myopathy (which can progress to rhabdomyolysis)
c)
Acute pancreatitis
d)
Peripheral neuropathy
e)
Lupus-like syndrome
103.
A patient with a recent myocardial infarction is started on a high-intensity statin. The GP explains this drug has a long half-life and can be taken at any time of day, but it is crucial to continue it long-term. Which of the following statins fits this description?
a)
Simvastatin
b)
Atorvastatin
c)
Pravastatin
d)
Fluvastatin
e)
Rosuvastatin
104.
A drug is noted to have "pleiotropic effects" beyond lipid-lowering, including plaque stabilisation, improved endothelial function, and anti-inflammatory properties. These additional benefits are primarily associated with which class of lipid-modifying agents?
a)
Fibrates
b)
Statins
c)
Ezetimibe
d)
Bile acid sequestrants
e)
Omega-3 fatty acids
105.
A patient on atorvastatin 80mg daily is prescribed a short course of clarithromycin. The GP considers the interaction risk but decides it is lower than with some other statins. Compared to simvastatin, why is atorvastatin considered to have a somewhat lower (but still present) risk from potent CYP3A4 inhibitors?
a)
It is not metabolised by CYP enzymes.
b)
It is renally excreted.
c)
It is metabolised by CYP3A4 to active metabolites, but is less dependent on this pathway than simvastatin.
d)
It induces CYP3A4, speeding up its own metabolism.
e)
It has no myotoxicity risk.
106.
Atorvastatin is initiated in a patient with familial hypercholesterolaemia. The primary therapeutic goal is a greater than 50% reduction in LDL-cholesterol. This potent LDL-lowering effect is achieved through which dual mechanism?
a)
Inhibiting cholesterol absorption and increasing faecal excretion.
b)
Inhibiting hepatic cholesterol synthesis (via HMG-CoA reductase) and upregulating hepatic LDL receptor expression.
c)
Increasing lipoprotein lipase activity and enhancing triglyceride clearance.
d)
Binding bile acids in the intestine and increasing cholesterol conversion to bile acids.
e)
Inhibiting PCSK9 binding to the LDL receptor.
107.
A 55-year-old man is admitted with an NSTEMI. He is commenced on dual antiplatelet therapy, a beta-blocker, an ACE inhibitor, and a lipid-lowering drug. According to current guidelines, what is the recommended intensity and indication for atorvastatin in this patient?
a)
Low intensity for primary prevention.
b)
High intensity (e.g., atorvastatin 80mg) for secondary prevention post-ACS.
c)
Moderate intensity only if LDL-C is >4.0 mmol/L.
d)
To be started only after 3 months of dietary modification.
e)
For symptomatic relief of angina.
108.
A patient on atorvastatin 40mg has routine blood tests which show an alanine transaminase (ALT) level three times the upper limit of normal. He is asymptomatic. What is the recommended management for this asymptomatic, mild hepatic transaminase elevation?
a)
Stop atorvastatin immediately and never restart.
b)
Continue therapy and recheck the LFTs; an isolated elevation <3x ULN is common and often resolves.
c)
Switch to a fibrate immediately.
d)
Admit for urgent liver biopsy.
e)
Halve the dose and check LFTs in 6 months.
109.
A patient with a history of polymyalgia rheumatica, on multiple medications metabolised by CYP450 enzymes, requires a statin. The rheumatologist chooses one known for having minimal CYP450 interactions. Which statin is most suitable due to its minimal metabolism via the cytochrome P450 system?
a)
Simvastatin
b)
Atorvastatin
c)
Pravastatin
d)
Fluvastatin
e)
Rosuvastatin
110.
A lipid-lowering agent is derived from a fungal metabolite, is hydrophilic, and is often considered in patients with concomitant conditions or on complex medication regimens. Despite its distinctive pharmacokinetics, this drug shares the core mechanism of action with which major class?
a)
Fibrates
b)
Statins (HMG-CoA reductase inhibitors)
c)
Cholesterol absorption inhibitors
d)
Bile acid sequestrants
e)
PCSK9 inhibitors
111.
A patient on pravastatin is also prescribed ciclosporin following a renal transplant. The team is aware of a significant interaction requiring dose adjustment. What is the primary mechanism by which ciclosporin increases pravastatin exposure and myopathy risk?
a)
CYP3A4 inhibition
b)
CYP2C9 inhibition
c)
Inhibition of hepatic uptake transporters (OATP1B1)
d)
Induction of pravastatin metabolism
e)
Protein-binding displacement
112.
Pravastatin's hydrophilicity influences its pharmacokinetics but not its final pharmacodynamic effect on cholesterol synthesis. Once inside the hepatocyte, what is pravastatin's direct molecular target?
a)
Acetyl-CoA carboxylase
b)
HMG-CoA reductase
c)
Microsomal triglyceride transfer protein (MTP)
d)
Proprotein convertase subtilisin/kexin type 9 (PCSK9)
e)
Lipoprotein lipase
113.
An elderly patient on warfarin for atrial fibrillation requires a statin for primary prevention. The GP seeks a statin with a lower potential to interact with warfarin's metabolism. In which scenario might pravastatin be a considered choice over other statins?
a)
When the most potent LDL reduction is required.
b)
When minimising drug-drug interaction risk is a priority, especially in patients on complex regimens.
c)
As first-line therapy for severe hypertriglyceridaemia.
d)
For the management of acute coronary syndrome.
e)
When cost is the only consideration.
114.
A patient is switched from simvastatin to pravastatin due to myalgia. He asks if the new drug carries the same risk of muscle problems. Which of the following is TRUE regarding pravastatin and myopathy risk?
a)
It has no risk of myopathy.
b)
Myopathy is a class effect of all statins, but the risk with pravastatin may be lower due to its pharmacokinetics.
c)
It causes a different type of myopathy that is always reversible.
d)
It only causes myopathy in combination with fibrates.
e)
Myopathy risk is higher with pravastatin than with atorvastatin.
115.
A patient with type 2 diabetes has a mixed dyslipidaemia: high triglycerides (4.5 mmol/L) and low HDL-C, with an LDL-C at target on a statin. An additional lipid-modifying agent is added specifically for the hypertriglyceridaemia. Which of the following is most likely added?
a)
Ezetimibe
b)
Fenofibrate
c)
Colestyramine
d)
Atorvastatin
e)
Icosapent ethyl
116.
A drug activates the nuclear transcription factor PPAR-alpha, leading to increased expression of genes involved in fatty acid oxidation and lipoprotein lipase activity. This mechanism defines which class of drugs?
a)
Statins
b)
Fibrates
c)
Bile acid sequestrants
d)
Cholesterol absorption inhibitors
e)
PCSK9 inhibitors
117.
A patient is taking both fenofibrate and warfarin. The INR is found to be significantly elevated, increasing the risk of bleeding. What is the most likely mechanism for this interaction?
a)
Fenofibrate induces CYP2C9, increasing warfarin metabolism.
b)
Fenofibrate displaces warfarin from plasma albumin, increasing free (active) warfarin levels.
c)
Fenofibrate inhibits vitamin K epoxide reductase.
d)
Warfarin reduces the renal excretion of fenofibrate.
e)
An idiosyncratic allergic reaction.
118.
Fenofibrate effectively lowers plasma triglyceride levels in patients with severe hypertriglyceridaemia. What is the primary effect of PPAR-α activation that leads to reduced triglyceride levels?
a)
Inhibits HMG-CoA reductase
b)
Stimulates lipoprotein lipase-mediated hydrolysis of VLDL and chylomicrons
c)
Blocks intestinal cholesterol absorption
d)
Increases hepatic LDL receptor expression
e)
Inhibits PCSK9
119.
A patient presents with eruptive xanthomas and a fasting triglyceride level of 18 mmol/L, putting them at high risk for acute pancreatitis. In which situation is fenofibrate most clearly indicated?
a)
Isolated high LDL-C as first-line therapy.
b)
Severe hypertriglyceridaemia (>10 mmol/L) to prevent acute pancreatitis.
c)
Primary prevention of CVD in all diabetic patients.
d)
To improve mortality in heart failure.
e)
To reduce proteinuria.
120.
A patient on long-term fenofibrate for mixed dyslipidaemia has routine blood tests. The results show a serum creatinine of 150 µmol/L (increased from baseline) and normal liver enzymes. What is a well-recognised, reversible adverse effect of fenofibrate on renal function?
a)
Acute tubular necrosis
b)
Reversible increase in plasma creatinine
c)
Nephrogenic diabetes insipidus
d)
Renal calculi
e)
Membranous glomerulonephritis
121.
A patient with heterozygous familial hypercholesterolaemia has an inadequate response to high-intensity atorvastatin. His cardiologist adds a second oral agent that works locally in the small intestine without systemic absorption. Which of the following is the generic name of this add-on medication?
a)
Fenofibrate
b)
Colestyramine
c)
Ezetimibe
d)
Alirocumab
e)
Icosapent ethyl
122.
A drug is described as selectively inhibiting the Niemann-Pick C1-Like 1 (NPC1L1) protein on enterocytes, reducing the intestinal uptake of dietary and biliary cholesterol. This drug belongs to which class?
a)
Statins
b)
Fibrates
c)
Bile acid sequestrants
d)
Cholesterol absorption inhibitors
e)
PCSK9 inhibitors
123.
Ezetimibe has a low risk of systemic drug interactions because it is metabolised in the intestinal wall and liver via glucuronide conjugation, not by the major cytochrome P450 enzymes. Which of the following is a key pharmacodynamic interaction when ezetimibe is used with a specific other lipid-lowering agent?
a)
Increased risk of hepatotoxicity with fibrates
b)
Enhanced LDL-C lowering when co-administered with a statin (additive effect)
c)
Reduced absorption of fat-soluble vitamins with colestyramine
d)
Potentiation of myopathy with colchicine
e)
Displacement from albumin with warfarin
124.
Ezetimibe reduces the delivery of cholesterol from the intestine to the liver, which triggers a compensatory response in hepatic cholesterol metabolism. What is the liver's primary adaptive response to ezetimibe, which contributes to its LDL-lowering effect?
a)
Increased secretion of VLDL
b)
Decreased bile acid synthesis
c)
Increased synthesis of LDL receptors
d)
Inhibition of HMG-CoA reductase
e)
Upregulation of PCSK9
125.
A patient with a history of statin intolerance (due to severe myalgia) has a persistently elevated LDL-C. Monotherapy with a non-statin agent is required. For which of the following is ezetimibe specifically indicated?
a)
First-line treatment for severe hypertriglyceridaemia.
b)
Primary or adjunctive lipid-lowering therapy in patients who cannot tolerate statins.
c)
To raise HDL-C as a primary goal.
d)
Acute management of hypercholesterolaemia.
e)
To prevent pancreatitis in hypertriglyceridaemia.
126.
A patient starting ezetimibe reports mild, transient gastrointestinal upset, including loose stools and abdominal pain. What is the most common category of adverse effects associated with ezetimibe?
a)
Hepatotoxicity
b)
Myopathy
c)
Gastrointestinal disturbances (e.g., diarrhoea, abdominal pain)
d)
Cognitive impairment
e)
Cough
127.
A patient with familial hypercholesterolaemia and established cardiovascular disease has an LDL-C of 4.5 mmol/L despite maximally tolerated statin and ezetimibe. His specialist prescribes a novel injectable therapy administered every two weeks. Which of the following PCSK9 inhibitors is most likely prescribed?
a)
Evolocumab
b)
Alirocumab
c)
Inclisiran
d)
Bempedoic acid
e)
Lomitapide
128.
A biologic therapy works by binding to and inactivating a circulating protease, preventing the degradation of hepatic LDL receptors, thereby dramatically increasing LDL clearance. This drug is a member of which class?
a)
Statins
b)
Fibrates
c)
Cholesterol absorption inhibitors
d)
PCSK9 (Proprotein convertase subtilisin/kexin type 9) inhibitors
e)
MTP inhibitors
129.
Alirocumab has a very low risk of pharmacokinetic drug interactions as it is not metabolised by cytochrome P450 enzymes. What is the primary mechanism by which alirocumab potentiates the effect of statin therapy?
a)
It inhibits statin metabolism.
b)
It provides complementary action, while alirocumab prevents their degradation.
c)
It displaces statins from plasma proteins.
d)
It increases statin absorption.
e)
It has no interaction with statins.
130.
Alirocumab leads to a dramatic, dose-dependent reduction in LDL-cholesterol levels, often exceeding 50%. How does alirocumab achieve this effect at a cellular level?
a)
Inhibits HMG-CoA reductase
b)
Blocks intestinal cholesterol absorption
c)
Binds circulating PCSK9, preventing it from binding to the LDL receptor
d)
Activates lipoprotein lipase
e)
Inhibits apolipoprotein B synthesis
131.
A patient is admitted with an acute coronary syndrome. He has a history of statin-induced rhabdomyolysis. His LDL-C remains very high. According to NICE guidance, for which patient group is alirocumab specifically recommended?
a)
First-line therapy for all primary prevention.
b)
Secondary prevention in adults with primary hypercholesterolaemia or mixed dyslipidaemia
c)
To treat hypertriglyceridaemia.
d)
To increase HDL-C in isolated low HDL.
e)
In all patients with diabetes.
132.
The most common side effects reported with alirocumab relate to the injection site itself. What is the most frequent adverse effect of subcutaneous alirocumab?
a)
Systemic allergic reactions
b)
Hepatotoxicity
c)
Injection site reactions (e.g., erythema, itching, swelling)
d)
Neurocognitive impairment
e)
New-onset diabetes
133.
A patient with recurrent ventricular tachycardia refractory to other drugs is started on a potent antiarrhythmic. He is warned it has a very long half-life, can cause skin photosensitivity and greyish discolouration, and requires regular monitoring of thyroid, liver, and lung function. Which drug is this?
a)
Flecainide
b)
Sotalol
c)
Amiodarone
d)
Lidocaine
e)
Mexiletine
134.
A drug exhibits electrophysiological effects of all four Vaughan Williams classes but is officially classified based on its predominant potassium channel blockade. What is the official Vaughan Williams classification of amiodarone?
a)
Class Ia
b)
Class Ib
c)
Class II
d)
Class III
e)
Class IV
135.
A patient on warfarin for atrial fibrillation is started on intravenous amiodarone for rhythm control. The INR must be checked daily. What is the primary mechanism by which amiodarone potentiates the effect of warfarin, significantly increasing bleeding risk?
a)
Displacement from protein binding
b)
Inhibition of cytochrome P450 enzymes (CYP2C9) responsible for warfarin metabolism
c)
Synergistic anticoagulant effect
d)
Reduced warfarin excretion
e)
Induction of warfarin metabolism
136.
Amiodarone is effective for both supraventricular and ventricular arrhythmias due to its complex electrophysiology. Which of the following is a key Class III effect of amiodarone that contributes to its efficacy in atrial fibrillation?
a)
Beta-blockade slowing sinus node discharge
b)
Prolongation of the atrial action potential and refractory period
c)
Fast sodium channel blockade in Purkinje fibres
d)
L-type calcium channel blockade in the AV node
e)
Vagolytic action
137.
During a cardiac arrest with a shockable rhythm (VF/pVT), Advanced Life Support guidelines recommend a specific antiarrhythmic after the third shock if adrenaline has been given. What is the role of intravenous amiodarone in this acute setting?
a)
First-line rate control in stable atrial fibrillation.
b)
Pharmacological therapy during cardiac arrest (shock-refractory VF/pVT) according to ALS algorithms.
c)
Long-term prophylaxis for neurocardiogenic syncope.
d)
First-line treatment for atrial flutter in Wolff-Parkinson-White syndrome.
e)
Treatment of bradycardia.
138.
A patient on long-term amiodarone presents with progressive shortness of breath and a dry cough. Chest X-ray shows bilateral interstitial shadowing. What is the most serious long-term adverse effect of amiodarone, which can be fatal?
a)
Hyperthyroidism
b)
Cirrhosis
c)
Corneal microdeposits
d)
Pulmonary fibrosis (amiodarone lung toxicity)
e)
Peripheral neuropathy
139.
A patient undergoing a minor surgical procedure receives a local anaesthetic via infiltration. The anaesthetist mentions using a preparation combined with a vasoconstrictor to prolong its duration of action and reduce systemic absorption. Which local anaesthetic is most commonly used in this way for infiltration anaesthesia?
a)
Bupivacaine
b)
Prilocaine
c)
Lidocaine (Lignocaine)
d)
Ropivacaine
e)
Cocaine
140.
A drug used both as a local anaesthetic and an antiarrhythmic works by blocking voltage-gated sodium channels, stabilizing neuronal and cardiac cell membranes. What is the Vaughan Williams classification of lidocaine when used as an antiarrhythmic?
a)
Class Ia
b)
Class Ib
c)
Class II
d)
Class III
e)
Class IV
141.
A patient receiving an intravenous lidocaine infusion for ventricular ectopy becomes confused, drowsy, and starts twitching. This progression of CNS symptoms is a classic sign of toxicity related to the drug's effect on which primary target?
a)
GABA receptors
b)
Voltage-gated sodium channels in the CNS
c)
Cardiac potassium channels
d)
NMDA receptors
e)
Muscarinic receptors
142.
In the emergency department, lidocaine is used for local anaesthesia prior to suturing a laceration. How does lidocaine produce a reversible loss of sensation in the infiltrated area?
a)
By activating potassium channels, hyperpolarising the neuron.
b)
By blocking voltage-gated sodium channels, preventing the initiation and propagation of action potentials.
c)
By inhibiting the release of acetylcholine from motor neurons.
d)
By acting as an agonist at opioid receptors.
e)
By causing local vasoconstriction and ischaemia.
143.
A patient develops frequent ventricular ectopic beats and short runs of non-sustained VT in the first 24 hours following an acute myocardial infarction. In which of the following historical scenarios was lidocaine used as a prophylactic antiarrhythmic?
a)
Long-term management of atrial fibrillation.
b)
Prophylaxis against ventricular arrhythmias in the early phase of acute MI (now rarely used).
c)
First-line treatment for supraventricular tachycardia.
d)
To control rate in atrial flutter.
e)
To treat digoxin-induced bradycardia.
144.
During a dental procedure using lidocaine with adrenaline, a patient becomes pale, anxious, and tachycardic. These symptoms are most likely due to the systemic effects of which component of the injection?
a)
Lidocaine toxicity
b)
Allergic reaction to the local anaesthetic
c)
Systemic absorption of adrenaline (epinephrine)
d)
Vasovagal syncope
e)
Seizure prodrome
145.
A patient with paroxysmal atrial fibrillation and a history of asthma requires rate control. The cardiologist chooses a calcium channel blocker that slows AV node conduction but has less negative inotropy than some alternatives, making it relatively safe in mild cardiac impairment. Which drug is most likely prescribed?
a)
Verapamil
b)
Diltiazem
c)
Amlodipine
d)
Bisoprolol
e)
Digoxin
146.
A drug blocks L-type calcium channels in cardiac and vascular smooth muscle, but its predominant clinical effects are on the sinoatrial and atrioventricular nodes. This drug is best classified as which type of calcium channel blocker?
a)
Dihydropyridine (e.g., nifedipine)
b)
Non-dihydropyridine (e.g., diltiazem)
c)
Phenylalkylamine (e.g., verapamil)
d)
Cardiac glycoside
e)
Class IV antiarrhythmic (a category that includes non-DHP CCBs)
147.
A patient on diltiazem for AF is started on simvastatin for hypercholesterolaemia. The GP reduces the simvastatin dose. This is because diltiazem inhibits which cytochrome P450 enzyme, increasing statin levels and myopathy risk?
a)
CYP1A2
b)
CYP2C9
c)
CYP3A4
d)
CYP2D6
e)
CYP2C19
148.
Diltiazem is effective for rate control in atrial fibrillation. What is its primary electrophysiological mechanism for this effect?
a)
Beta-1 receptor blockade
b)
Slowing of calcium-dependent depolarisation in the AV node, increasing refractory period
c)
Increased vagal tone
d)
Fast sodium channel blockade
e)
Potassium channel blockade
149.
A patient with stable angina and a history of COPD is started on a medication to reduce myocardial oxygen demand and prevent angina attacks. For which of the following is diltiazem a suitable first-line antianginal agent?
a)
Acute management of Prinzmetal's angina.
b)
Chronic stable angina, particularly when beta-blockers are contraindicated.
c)
First-line therapy for hypertensive urgency.
d)
To improve mortality in heart failure with reduced ejection fraction.
e)
Treatment of heart failure with preserved ejection fraction.
150.
A patient on diltiazem for rate control presents with swelling of the lower legs and ankles. He has no orthopnoea, paroxysmal nocturnal dyspnoea, or elevated JVP. What is the most likely cause of this oedema, a known side effect of calcium channel blockers?
a)
Right heart failure
b)
Nephrotic syndrome
c)
Arteriolar dilation leading to intracapillary hypertension and fluid leakage
d)
Hyperaldosteronism
e)
An allergic reaction
151.
A patient with supraventricular tachycardia (SVT) is given an intravenous medication that rapidly terminates the arrhythmia. The doctor notes it is a calcium channel blocker with potent effects on the AV node and can cause constipation. Which drug is this?
a)
Adenosine
b)
Verapamil
c)
Diltiazem
d)
Amlodipine
e)
Metoprolol
152.
A drug is a phenylalkylamine derivative that blocks L-type calcium channels, with its most pronounced effects on cardiac nodal tissue and smooth muscle. What is its primary pharmacological classification?
a)
Dihydropyridine calcium channel blocker
b)
Non-dihydropyridine calcium channel blocker (Class IV antiarrhythmic)
c)
Beta-adrenergic blocker
d)
Sodium channel blocker
e)
Potassium channel activator
153.
A patient with AF on verapamil for rate control is also taking digoxin. The digoxin level is found to be in the toxic range. What is the primary mechanism by which verapamil increases digoxin levels?
a)
Displacement from tissue binding sites
b)
Reducing renal and non-renal clearance of digoxin
c)
Synergistic inotropic effect
d)
Induction of P-glycoprotein
e)
Increased absorption of digoxin
154.
Verapamil is effective in terminating atrioventricular nodal re-entrant tachycardia (AVNRT). How does it achieve this?
a)
By blocking sodium channels in the accessory pathway.
b)
By prolonging the refractory period and slowing conduction in the AV node, breaking the re-entrant circuit.
c)
By increasing vagal tone via muscarinic receptor agonism.
d)
By stimulating adenosine receptors.
e)
By blocking beta-1 receptors in the atrium.
155.
A patient presents with a regular narrow-complex tachycardia at 180 bpm. Vagal manoeuvres are unsuccessful. In which acute scenario is intravenous verapamil a recognised treatment option?
a)
Stable monomorphic ventricular tachycardia.
b)
Atrial fibrillation with rapid ventricular response.
c)
Haemodynamically stable supraventricular tachycardia (SVT)
d)
Bradycardia due to sick sinus syndrome.
e)
Torsades de pointes.
156.
An elderly patient started on verapamil for hypertension complains of severe constipation requiring regular laxatives. What is the mechanism of this very common adverse effect?
a)
Anticholinergic action
b)
Inhibition of calcium-dependent smooth muscle contraction in the intestinal wall
c)
Opioid receptor activation
d)
Dehydration from diuresis
e)
Magnesium deficiency
157.
A 55-year-old man presents with acute central chest pain. In the emergency department, he is given 300mg of a chewable tablet of a drug with antiplatelet properties as part of his immediate management. What is the generic name of this drug?
a)
Clopidogrel
b)
Aspirin (Acetylsalicylic Acid)
c)
Ticagrelor
d)
Heparin
e)
Prasugrel
158.
A drug irreversibly acetylates a cyclooxygenase enzyme in platelets, inhibiting thromboxane A2 synthesis and thereby platelet aggregation for the lifespan of the platelet. This drug is best described as what?
a)
Vitamin K antagonist
b)
Cyclooxygenase inhibitor (antiplatelet agent)
c)
P2Y12 receptor antagonist
d)
Direct thrombin inhibitor
e)
Phosphodiesterase inhibitor
159.
A patient on low-dose aspirin for secondary prevention is prescribed ibuprofen for osteoarthritis pain. Why might this combination be problematic for aspirin's cardioprotective effect?
a)
Ibuprofen increases aspirin metabolism.
b)
Ibuprofen can competitively block access to the COX-1 active site.
c)
It increases the risk of hyperkalaemia.
d)
It synergistically increases bleeding risk only.
e)
There is no significant interaction.
160.
Low-dose aspirin is used for the primary prevention of cardiovascular events in selected high-risk individuals. What is the primary pharmacological mechanism responsible for this effect?
a)
Inhibition of vitamin K epoxide reductase
b)
Irreversible inhibition of platelet COX-1, reducing thromboxane A2-mediated platelet aggregation
c)
Blockade of the P2Y12 ADP receptor on platelets
d)
Activation of antithrombin III
e)
Inhibition of phosphodiesterase, increasing cAMP
161.
A 70-year-old man with atrial fibrillation, hypertension, and a history of peptic ulcer disease is assessed for stroke risk. He has a CHA2DS2-VASc score of 4. For which of the following is aspirin NO LONGER recommended as first-line therapy according to modern guidelines?
a)
Secondary prevention after an ischaemic stroke or TIA.
b)
Stroke prevention in atrial fibrillation (an oral anticoagulant is preferred).
c)
Acute treatment of an ST-elevation myocardial infarction (with a P2Y12 inhibitor).
d)
Analgesia for mild musculoskeletal pain.
e)
Anti-inflammatory therapy in acute pericarditis.
162.
An elderly patient on long-term low-dose aspirin presents with melaena and is found to have a bleeding gastric ulcer. What is the primary mechanism by which aspirin contributes to upper GI toxicity?
a)
Direct chemical irritation of the gastric mucosa.
b)
Systemic inhibition of COX-1.
c)
Induction of Helicobacter pylori infection.
d)
Causing oesophageal varices.
e)
Allergic reaction.
163.
A patient with a drug-eluting coronary stent is prescribed two antiplatelet agents for 12 months to prevent stent thrombosis. One is aspirin, the other is a thienopyridine prodrug. Which thienopyridine is most commonly used in this dual antiplatelet therapy (DAPT) regimen?
a)
Ticagrelor
b)
Clopidogrel
c)
Prasugrel
d)
Dipyridamole
e)
Ticlopidine
164.
A drug requires hepatic bioactivation by CYP450 enzymes to produce an active metabolite that irreversibly binds to the P2Y12 receptor on platelets. This describes which class of antiplatelet agents?
a)
Cyclooxygenase inhibitors
b)
Glycoprotein IIb/IIIa inhibitors
c)
P2Y12 receptor antagonists (thienopyridines)
d)
Phosphodiesterase inhibitors
e)
Protease-activated receptor-1 antagonists
165.
A patient prescribed clopidogrel after a stroke is also started on omeprazole for dyspepsia. The pharmacist raises a concern about reduced antiplatelet efficacy. What is the mechanism for this drug-drug interaction?
a)
Omeprazole induces clopidogrel metabolism.
b)
Omeprazole inhibits CYP2C19, the enzyme required to activate clopidogrel.
c)
Omeprazole displaces clopidogrel from plasma proteins.
d)
Both drugs cause hypergastrinaemia.
e)
There is no proven clinical interaction.
166.
Clopidogrel is used in combination with aspirin to provide more comprehensive platelet inhibition. How does the active metabolite of clopidogrel achieve irreversible platelet inhibition?
a)
By acetylating COX-1.
b)
By forming a disulfide bridge with the P2Y12 ADP receptor on the platelet surface.
c)
By blocking the glycoprotein IIb/IIIa receptor.
d)
By inhibiting thromboxane synthase.
e)
By increasing platelet cyclic AMP.
167.
A patient is admitted with a non-ST elevation myocardial infarction (NSTEMI). They are treated with aspirin, fondaparinux, and a loading dose of a second antiplatelet agent. In which scenario is clopidogrel a standard component of initial management?
a)
First-line monotherapy for stroke prevention in atrial fibrillation.
b)
As part of dual antiplatelet therapy (with aspirin) in acute coronary syndrome.
c)
Primary treatment for deep vein thrombosis.
d)
To reverse the effects of heparin.
e)
As a substitute for aspirin in patients with gout.
168.
A major concern with all potent antiplatelet agents, including clopidogrel, is bleeding. What is the most serious, but rare, haematological adverse effect specifically associated with clopidogrel and other thienopyridines?
a)
Vitamin K deficiency
b)
Haemolytic anaemia
c)
Thrombotic thrombocytopenic purpura (TTP)
d)
Aplastic anaemia
e)
Neutropenia
169.
A 58-year-old man with diabetes and no history of stroke is undergoing primary PCI for an acute STEMI. The interventional cardiologist chooses a potent, rapidly-acting P2Y12 inhibitor to load alongside aspirin. Which of the following P2Y12 inhibitors fits this description?
a)
Clopidogrel
b)
Prasugrel
c)
Ticagrelor
d)
Dipyridamole
e)
Ticlopidine
170.
A drug is a prodrug that, once metabolized, irreversibly binds to the P2Y12 receptor on platelets, providing potent and consistent antiplatelet effects. This drug belongs to which class?
a)
Cyclooxygenase inhibitors
b)
Glycoprotein IIb/IIIa inhibitors
c)
P2Y12 receptor antagonists (thienopyridines)
d)
Phosphodiesterase inhibitors
e)
Direct oral anticoagulants
171.
Prasugrel is not recommended for patients with a history of prior stroke or TIA. What was the finding in the TRITON-TIMI 38 trial that led to this strong contraindication?
a)
Reduced efficacy in this subgroup.
b)
Significant increase in the risk of intracranial haemorrhage.
c)
Increased incidence of stent thrombosis.
d)
Severe hepatotoxicity.
e)
No interaction, it is simply less effective.
172.
Prasugrel achieves more consistent platelet inhibition than clopidogrel because its activation is less dependent on specific CYP450 enzymes. What is a key advantage of prasugrel's metabolic pathway?
a)
It is activated in the intestine before absorption.
b)
It undergoes rapid and efficient hydrolysis by esterases.
c)
It does not require hepatic metabolism at all.
d)
It is activated by platelets directly.
e)
It is a reversible inhibitor.
173.
A 45-year-old man is undergoing percutaneous coronary intervention (PCI) for an acute coronary syndrome. He has no history of stroke and is not at high risk of bleeding. In which specific patient population is prasugrel indicated?
a)
All patients with stable angina.
b)
Patients with ACS (UA/NSTEMI/STEMI) undergoing PCI who are not at high bleeding risk and have no history of stroke/TIA.
c)
First-line therapy for stroke prevention in atrial fibrillation.
d)
Medical management of ACS without revascularization.
e)
Patients with a history of intracranial haemorrhage.
174.
The most significant risk with prasugrel, as with all potent antiplatelet agents, is bleeding. Compared to clopidogrel, prasugrel is associated with:
a)
A lower risk of bleeding but higher risk of stent thrombosis.
b)
Greater potency and faster onset, but also an increased risk of major bleeding.
c)
A lower risk of dyspnea.
d)
A lower risk of gastrointestinal upset.
e)
No difference in bleeding risk.
175.
A 70-year-old man presents to the emergency department 90 minutes after the onset of severe left-sided weakness and slurred speech. A CT head scan shows no haemorrhage. The stroke team prepares to administer a recombinant tissue-type plasminogen activator. Which fibrinolytic agent is most likely to be used?
a)
Streptokinase
b)
Alteplase
c)
Tenecteplase
d)
Urokinase
e)
Reteplase
176.
A drug converts plasminogen to plasmin, which then degrades fibrin within a thrombus. It has some degree of fibrin specificity. This drug belongs to which class?
a)
Antiplatelets
b)
Anticoagulants
c)
Fibrinolytics (thrombolytics)
d)
Factor Xa inhibitors
e)
Haemostatics
177.
A patient receives alteplase for an acute ischaemic stroke. Concurrent administration of which other class of drugs is absolutely contraindicated due to the risk of catastrophic bleeding?
a)
Statins
b)
Beta-blockers
c)
Anticoagulants (e.g., heparin, warfarin)
d)
Antihypertensives
e)
Anti-emetics
178.
Alteplase is used to dissolve pathological thrombi in conditions like acute myocardial infarction or stroke. How does alteplase achieve clot lysis?
a)
Directly inhibits thrombin.
b)
Binds to fibrin within a thrombus and converts entrapped plasminogen to plasmin.
c)
Inhibits platelet aggregation.
d)
Chelates calcium ions.
e)
Degrades fibrinogen directly.
179.
A 55-year-old man presents with acute central chest pain and ST-segment elevation in leads V1-V4. He is 2 hours from symptom onset and the nearest PCI centre is over 120 minutes away. For which of the following is alteplase a recommended treatment?
a)
First-line treatment for NSTEMI.
b)
Fibrinolysis for STEMI when primary PCI cannot be delivered within 120 minutes of diagnosis.
c)
Treatment of submassive pulmonary embolism with hypotension.
d)
Prophylaxis against deep vein thrombosis.
e)
Management of stable angina.
180.
The most feared complication of alteplase therapy in acute ischaemic stroke is intracerebral haemorrhage. What is the most significant risk factor for this catastrophic adverse effect?
a)
Age over 60
b)
Deviation from strict inclusion/exclusion criteria
c)
Female sex
d)
History of diabetes
e)
Hypercholesterolaemia
181.
A patient admitted with an acute NSTEMI is treated with dual antiplatelet therapy and a subcutaneous, weight-adjusted anticoagulant administered twice daily. Which low molecular weight heparin is most commonly used in this scenario?
a)
Unfractionated heparin
b)
Enoxaparin
c)
Dalteparin
d)
Tinzaparin
e)
Fondaparinux
182.
A drug is a glycosaminoglycan derived from porcine intestine that exerts its anticoagulant effect primarily by potentiating antithrombin III to inhibit Factor Xa more than Factor IIa (thrombin). This drug belongs to which class?
a)
Direct thrombin inhibitors
b)
Vitamin K antagonists
c)
Low molecular weight heparins
d)
Direct Factor Xa inhibitors
e)
Fibrinolytics
183.
A major advantage of enoxaparin over unfractionated heparin is its more predictable pharmacokinetics, reducing the need for routine monitoring. What is the primary reason for this predictability?
a)
It is not renally excreted.
b)
It has less binding to plasma proteins and cells, leading to a more consistent dose-response.
c)
It is metabolized by liver cytochrome P450 enzymes.
d)
It has a very short half-life.
e)
It is not a polysaccharide.
184.
Enoxaparin is used for thromboprophylaxis in medical and surgical patients. How does enoxaparin's interaction with antithrombin III (ATIII) inhibit coagulation?
a)
It directly blocks the active site of thrombin.
b)
It binds to ATIII, inducing a conformational change that accelerates its inhibition of Factor Xa.
c)
It chelates calcium ions required for clotting.
d)
It inhibits vitamin K epoxide reductase.
e)
It activates protein C.
185.
A patient with a confirmed proximal deep vein thrombosis is treated as an outpatient. They are started on a LMWH and warfarin, with the LMWH continued until the INR is therapeutic for 2 consecutive days. What is the role of enoxaparin in the initial treatment of VTE?
a)
Long-term monotherapy for VTE.
b)
Bridge therapy providing immediate anticoagulation.
c)
Primary treatment for heparin-induced thrombocytopenia.
d)
Reversal agent for dabigatran.
e)
Fibrinolytic therapy.
186.
A patient on therapeutic enoxaparin for a pulmonary embolism develops a progressive drop in platelet count, falling from 220 to 80 x 10^9/L over 5 days. What is the most serious haematological adverse effect of heparin products, including enoxaparin (though less common than with UFH)?
a)
Haemolytic anaemia
b)
Heparin-induced thrombocytopenia (HIT)
c)
Aplastic anaemia
d)
Thrombotic thrombocytopenic purpura
e)
Neutropenia
187.
A patient with active cancer is diagnosed with a deep vein thrombosis. The oncologist chooses a LMWH for long-term (6-month) anticoagulation, as guidelines recommend it over warfarin in this population. Which LMWH could be used for this cancer-associated VTE indication?
a)
Enoxaparin
b)
Dalteparin
c)
Tinzaparin
d)
Fondaparinux
e)
Bemiparin
188.
A parenteral anticoagulant with a mean molecular weight of approximately 5000 daltons is used for thromboprophylaxis and treatment. This drug is a member of which class?
a)
Unfractionated heparins
b)
Low molecular weight heparins
c)
Direct oral anticoagulants
d)
Vitamin K antagonists
e)
Factor Xa inhibitors
189.
Dalteparin requires dose adjustment in patients with severe renal impairment (CrCl <30 mL/min). Why is caution required in renal failure?
a)
It is metabolized hepatically by CYP3A4.
b)
It is primarily renally excreted, and accumulation can increase bleeding risk.
c)
It causes direct nephrotoxicity.
d)
It induces renal potassium wasting.
e)
It is protein-bound and displaced by uremic toxins.
190.
Dalteparin, like other LMWHs, inhibits coagulation by activating antithrombin III. What is the primary consequence of this activation?
a)
Direct inhibition of thrombin (Factor IIa) only.
b)
Predominant inhibition of Factor Xa, with less effect on Factor IIa compared to UFH.
c)
Inhibition of tissue factor.
d)
Activation of Protein C.
e)
Inhibition of platelet aggregation.
191.
A patient undergoing major abdominal surgery for cancer is given a subcutaneous injection 2 hours pre-operatively to prevent venous thromboembolism. For which of the following is dalteparin most commonly used?
a)
Treatment of acute stroke.
b)
Prophylaxis against venous thromboembolism in high-risk surgical or medical patients.
c)
Long-term management of atrial fibrillation.
d)
Reversal of warfarin overdose.
e)
Treatment of disseminated intravascular coagulation.
192.
The most common adverse effect of dalteparin, as with all anticoagulants, is bleeding. Which of the following is a specific advantage of dalteparin over unfractionated heparin in terms of adverse effect profile?
a)
It does not cause bleeding.
b)
It has a lower incidence of heparin-induced thrombocytopenia (HIT).
c)
It does not require monitoring.
d)
It causes less osteoporosis with long-term use.
e)
Both B and D are correct.
193.
A 75-year-old woman with paroxysmal atrial fibrillation and a history of peptic ulcer disease is started on a direct oral anticoagulant for stroke prevention. Her GP chooses one that is taken once daily and has proven efficacy and safety in a large trial involving an Asian population. Which DOAC fits this description?
a)
Dabigatran
b)
Rivaroxaban
c)
Apixaban
d)
Edoxaban
e)
Betrixaban
194.
A drug directly and competitively inhibits free and clot-bound Factor Xa without requiring a cofactor like antithrombin. This drug is a:
a)
Direct thrombin inhibitor
b)
Vitamin K antagonist
c)
Low molecular weight heparin
d)
Direct Factor Xa inhibitor
e)
Indirect Factor Xa inhibitor
195.
Edoxaban's efficacy is reduced in patients with very good renal function. Why is there a dose reduction or contraindication in patients with a CrCl >95 mL/min?
a)
Increased metabolism by CYP3A4.
b)
Increased renal clearance of the drug.
c)
Competitive binding with creatinine.
d)
Induction of P-glycoprotein.
e)
High risk of hepatotoxicity.
196.
Edoxaban prevents thrombus formation and propagation by inhibiting a key step in the coagulation cascade. What is the direct consequence of Factor Xa inhibition?
a)
Increased production of antithrombin III.
b)
Reduced generation of thrombin (Factor IIa) from prothrombin.
c)
Direct degradation of fibrin.
d)
Inhibition of platelet adhesion.
e)
Chelation of calcium ions.
197.
A patient with a newly diagnosed unprovoked pulmonary embolism receives 5 days of therapeutic LMWH and is then switched to an oral anticoagulant for 3 months of treatment. For which of the following is edoxaban licensed?
a)
Monotherapy for acute HIT.
b)
Treatment and secondary prevention of DVT and PE.
c)
Primary prevention of VTE in all medical inpatients.
d)
Anticoagulation for mechanical heart valves.
e)
Treatment of acute coronary syndrome.
198.
A patient on edoxaban for atrial fibrillation presents with haematuria and bruising. Her renal function is stable. What is the major adverse effect of all DOACs, including edoxaban?
a)
Hepatotoxicity
b)
Bleeding
c)
Hyperkalaemia
d)
Headache
e)
Cough
199.
A patient with atrial fibrillation is started on a DOAC taken once daily with food. The GP explains it has a dual mode of excretion and does not require initial heparin bridging for VTE treatment. Which DOAC is this?
a)
Dabigatran
b)
Rivaroxaban
c)
Apixaban
d)
Edoxaban
e)
Betrixaban
200.
An oral anticoagulant that directly inhibits Factor Xa and has a high oral bioavailability. This drug is a:
a)
Direct thrombin inhibitor
b)
Vitamin K antagonist
c)
Direct Factor Xa inhibitor
d)
Indirect Factor Xa inhibitor
e)
Heparinoid
201.
Rivaroxaban is metabolized by CYP3A4 and is a substrate for the P-glycoprotein (P-gp) efflux transporter. Concurrent use with a potent dual inhibitor of both CYP3A4 and P-gp (e.g., ketoconazole) is contraindicated because it:
a)
Induces metabolism, reducing efficacy.
b)
Markedly increases rivaroxaban plasma concentrations, raising bleeding risk.
c)
Causes hepatotoxicity.
d)
Displaces rivaroxaban from albumin.
e)
Causes hyperkalaemia.
202.
Rivaroxaban is used for stroke prevention in AF by interrupting the coagulation cascade. By inhibiting Factor Xa, rivaroxaban primarily prevents:
a)
The conversion of fibrinogen to fibrin.
b)
Platelet activation by ADP.
c)
The conversion of prothrombin to thrombin.
d)
The activation of Factor XIII.
e)
The synthesis of vitamin K-dependent clotting factors.
203.
A patient undergoes elective total knee replacement surgery. They are prescribed an oral anticoagulant for 14 days to prevent post-operative venous thromboembolism. For which of the following is rivaroxaban specifically licensed?
a)
Treatment of acute STEMI.
b)
Thromboprophylaxis after elective hip or knee replacement surgery.
c)
Primary prevention of VTE in all hospitalized patients.
d)
Anticoagulation during pregnancy.
e)
Reversal of warfarin effect.
204.
A common concern with all DOACs is the risk of bleeding. For rivaroxaban, gastrointestinal bleeding rates in trials were somewhat higher than for some comparators. What is a possible pharmacological reason for this observation?
a)
It is exclusively renally excreted.
b)
A higher proportion of the drug is excreted unchanged in the faeces.
c)
It causes gastric ulcers.
d)
It inhibits platelet cyclooxygenase.
e)
It is highly protein-bound.
205.
An elderly man with a metallic mitral valve replacement attends the anticoagulation clinic for a regular finger-prick blood test to monitor his therapy. He carries a yellow dosing booklet. Which oral anticoagulant is he most likely taking?
a)
Dabigatran
b)
Rivaroxaban
c)
Apixaban
d)
Warfarin
e)
Edoxaban
206.
A drug exerts its anticoagulant effect by interfering with the synthesis of vitamin K-dependent clotting factors (II, VII, IX, X) and proteins C and S. This drug is a:
a)
Direct thrombin inhibitor
b)
Vitamin K antagonist
c)
Direct Factor Xa inhibitor
d)
Indirect Factor Xa inhibitor
e)
Heparin
207.
A patient on stable warfarin therapy is prescribed a course of trimethoprim for a urinary tract infection. One week later, his INR is found to be significantly elevated. What is a common mechanism for this interaction with many antibiotics?
a)
Induction of warfarin metabolism.
b)
Reduction of vitamin K production by gut flora, enhancing warfarin's effect.
c)
Displacement of warfarin from plasma proteins.
d)
Direct inhibition of clotting factor synthesis.
e)
Synergistic antiplatelet effect.
208.
Warfarin's full anticoagulant effect is delayed for several days after starting treatment. Why is there this delay?
a)
It is a prodrug requiring activation.
b)
It inhibits the synthesis of clotting factors but does not affect circulating factors.
c)
It is slowly absorbed from the GI tract.
d)
It must first inhibit platelet function.
e)
It requires loading with heparin.
209.
A 45-year-old woman with a history of recurrent DVTs and known antiphospholipid syndrome (triple positive) requires long-term anticoagulation. In which patient population is warfarin often still preferred over DOACs?
a)
All patients with atrial fibrillation.
b)
Patients with antiphospholipid syndrome and mechanical heart valves.
c)
First-line for VTE treatment in cancer patients.
d)
Primary prevention in low-risk patients.
e)
Patients with severe renal impairment (CrCl <15).
210.
The major adverse effect of warfarin is bleeding. A specific concern is warfarin-induced skin necrosis. What is the proposed mechanism for this rare, serious adverse effect?
a)
Allergic vasculitis.
b)
Rapid depletion of the natural anticoagulant protein C before factors II, IX, X are depleted.
c)
Direct toxic effect on dermal capillaries.
d)
Microembolization from atrial fibrillation.
e)
Interaction with heparin.
211.
A neonate born at 32 weeks gestation receives an intramuscular injection shortly after birth to prevent a haemorrhagic disease caused by deficiency of vitamin K-dependent clotting factors. Which form of vitamin K is used for this prophylactic purpose?
a)
Vitamin K3 (Menadione)
b)
Vitamin K1 (Phytomenadione/Phytonadione)
c)
Vitamin K2 (Menaquinone)
d)
Tranexamic acid
e)
Protamine sulfate
212.
A drug is a fat-soluble vitamin that acts as an essential cofactor for the hepatic synthesis of functional clotting factors II, VII, IX, and X. This drug is classified as:
a)
An anticoagulant
b)
A fibrinolytic
c)
A vitamin (cofactor for gamma-carboxylation)
d)
A direct thrombin inhibitor
e)
A platelet aggregator
213.
Vitamin K is administered as an antidote for warfarin overdose. How does vitamin K reverse the effects of warfarin?
a)
It directly inhibits warfarin binding to its receptor.
b)
It acts as a substrate for vitamin K epoxide reductase, bypassing the warfarin block and allowing regeneration of active reduced vitamin K.
c)
It degrades warfarin in the liver.
d)
It stimulates the synthesis of new clotting factors independently of carboxylation.
e)
It displaces warfarin from plasma proteins.
214.
Vitamin K is essential for the production of functional clotting factors. What is the specific biochemical reaction it co-factors?
a)
Hydroxylation of proline residues.
b)
Gamma-carboxylation of glutamic acid residues on clotting factor precursors.
c)
Glycosylation of serine residues.
d)
Methylation of arginine residues.
e)
Sulfation of tyrosine residues.
215.
A patient on warfarin presents with an INR of 8.5 but no active bleeding. Management includes withholding warfarin and administering a specific reversal agent. What is the role of oral vitamin K in this scenario?
a)
Immediate full reversal for life-threatening bleeding.
b)
Correction of excessively high INR in a non-bleeding patient.
c)
Primary treatment for haemophilia.
d)
Prevention of thrombosis.
e)
Replacement therapy in malabsorption syndromes only.
216.
Intravenous vitamin K can be used for urgent warfarin reversal but carries a small risk of a serious adverse reaction. What is the most serious, though rare, adverse effect associated with intravenous vitamin K administration?
a)
Hyperkalaemia
b)
Anaphylactoid reactions
c)
Hepatic necrosis
d)
Thrombosis
e)
Haemolytic anaemia
100 %
