Anticholinergic Pharmacology - MCQs

A 62-year-old man with Parkinson's disease complains of tremors and rigidity. The neurologist prescribes a centrally acting anticholinergic drug to help with these symptoms. Which drug is most appropriate in this case?

• Ipratropium

• Atropine

• Scopolamine

• Trihexyphenidyl

• Glycopyrrolate

A farmer is brought to the emergency department after accidental exposure to insecticides. He presents with bradycardia, bronchorrhea, and miosis. The diagnosis of organophosphate poisoning is made. Which anticholinergic drug is used to reverse his muscarinic symptoms?

• Pralidoxime

• Scopolamine

• Neostigmine

• Atropine

• Physostigmine

A 68-year-old man with a history of chronic obstructive pulmonary disease (COPD) complains of shortness of breath. The physician prescribes an inhaled bronchodilator with anticholinergic activity. Which drug was most likely prescribed?

• Dicyclomine

• Oxybutynin

• Ipratropium

• Tropicamide

• Atropine

A pharmacology professor asks a student to explain how anticholinergic agents like atropine work. Which of the following best describes the mechanism of these drugs?

• Agonists at muscarinic receptors

• Inhibitors of acetylcholinesterase

• Blockade of nicotinic receptors

• Competitive antagonists at muscarinic receptors

• Activation of beta-2 adrenergic receptors

A 70-year-old man is started on a medication for irritable bowel syndrome. A week later, he presents with difficulty in urination and complaints of dry mouth. Which adverse effect is most likely due to the anticholinergic nature of his drug?

• Bradycardia

• Diarrhea

• Excessive salivation

• Urinary retention

• Sweating

A patient undergoing general anesthesia is given a medication pre-operatively to reduce airway secretions. Which anticholinergic drug is commonly used for this purpose?

• Ipratropium

• Glycopyrrolate

• Tropicamide

• Darifenacin

• Dicyclomine

A 45-year-old woman visits the ophthalmologist for a routine eye examination. She is given an eye drop that causes dilation of the pupil and temporary paralysis of accommodation. Which drug is most likely responsible for this effect?

• Ipratropium

• Atropine

• Scopolamine

• Tropicamide

• Homatropine

An elderly woman with urinary incontinence is prescribed an anticholinergic. She later complains of eye pain and blurred vision. On examination, her intraocular pressure is elevated. What condition contraindicates the use of anticholinergics in this patient?

• Hypertension

• Asthma

• Glaucoma

• Peptic ulcer

• Motion sickness

A 55-year-old woman with symptoms of urgency and frequent urination is diagnosed with overactive bladder. Her physician prescribes an antimuscarinic agent. Which drug is most appropriate in this case?

• Tiotropium

• Oxybutynin

• Atropine

• Ipratropium

• Scopolamine

A 65-year-old man is being treated for Parkinsonism. A few weeks after starting a new medication, he becomes disoriented and complains of dry mouth and blurred vision. Which drug is most likely causing these anticholinergic side effects?

• Levodopa

• Carbidopa

• Trihexyphenidyl

• Entacapone

• Selegiline