A 6-year-old child requires induction of anesthesia for tonsillectomy. The anesthetist prefers a non-irritant, rapid-acting inhalational agent. Which is most suitable?

A 60-year-old man develops hepatitis a few days after surgery. He was anesthetized with an inhalational agent known for hepatotoxicity. Which drug is responsible?

A 35-year-old woman undergoing cesarean section is given an IV anesthetic that allows rapid recovery and minimal neonatal depression. Which is preferred?

A 50-year-old man with coronary artery disease is undergoing surgery. Which IV anesthetic should be avoided due to increased myocardial depression?

A 25-year-old trauma patient with hypovolemic shock needs anesthesia for emergency surgery. Which IV agent maintains cardiovascular stability?

A 30-year-old woman receives an IV anesthetic that produces dissociative anesthesia, analgesia, and hallucinations. Which drug was used?

A 70-year-old patient develops postoperative nausea after use of an inhalational anesthetic. Which drug is least likely to cause this?

During anesthesia, a patient shows rapid induction and emergence due to low blood:gas partition coefficient. Which agent likely used?

A 40-year-old woman with porphyria is planned for anesthesia. Which agent is contraindicated?

A 58-year-old man develops arrhythmias and hepatic dysfunction after exposure to an anesthetic gas. Identify the agent.

A 10-year-old child requires dental extraction under sedation. Which benzodiazepine is most suitable for short procedures?

A 40-year-old man on chronic corticosteroid therapy undergoes surgery. Which anesthetic should be avoided due to adrenal suppression?

A patient undergoing anesthesia is found to have diffusely increased muscle rigidity and hyperthermia. What is the best treatment?

A 50-year-old woman undergoing laparoscopic surgery requires an agent that provides analgesia as well as anesthesia. Which drug fulfills both?

A 45-year-old man develops megaloblastic anemia after prolonged anesthesia exposure. Which gas may cause this?

A patient receives thiopental for induction. Which pharmacokinetic property explains its brief duration of action?

A 28-year-old woman under general anesthesia suddenly develops muscle rigidity, hyperthermia, and acidosis. Which combination likely caused it?

A 45-year-old patient requires an anesthetic with rapid onset and recovery for ambulatory surgery. Which pair of properties is ideal?

A patient is maintained on nitrous oxide anesthesia. Despite high concentration, surgical anesthesia is not achieved. Why?

A 45-year-old man undergoing surgery with halothane shows delayed emergence. Which pharmacokinetic property explains this?

A 50-year-old man is given an inhalational anesthetic that antagonizes NMDA receptors rather than acting on GABA-A. Identify it.

A 25-year-old man with schizophrenia is treated with haloperidol but develops severe rigidity and tremor. Which alternative drug would be least likely to cause these symptoms?

A patient on long-term fluphenazine develops involuntary lip-smacking and tongue protrusion. What is the most appropriate step?

A 40-year-old male on haloperidol presents with hyperthermia, muscle rigidity, and autonomic instability. Which drug is most appropriate for treatment?

A 28-year-old woman on clozapine therapy develops sore throat and fever. What is the next step?

A 30-year-old woman on olanzapine gains 12 kg over 8 months. Which receptor blockade explains this?

A patient on risperidone develops galactorrhea and menstrual irregularities. Which mechanism is responsible?

A 50-year-old patient on thioridazine reports dry mouth and constipation. Which receptor is responsible?

A 60-year-old man develops dizziness and postural hypotension after starting chlorpromazine. Mechanism?

A patient on risperidone shows improvement with fewer extrapyramidal effects compared to haloperidol. What receptor action explains this?

Which antipsychotic is most effective for treating negative symptoms of schizophrenia (social withdrawal, blunted affect)?

A 26-year-old woman treated with risperidone complains of breast tenderness and galactorrhea. This effect is due to blockade of D₂ receptors in which pathway?

A 30-year-old woman with bipolar disorder is started on lithium carbonate. Which of the following best describes its mechanism?

A pregnant woman on lithium gives birth. Which statement is correct?

A bipolar patient on lithium complains of polyuria and thirst. Which condition best explains this?

A 29-year-old woman on lithium throughout the first trimester delivers a baby with tricuspid valve displacement. What is the diagnosis?

Chlorpromazine and haloperidol can be considered prototypes of two relatively old but still used antipsychotic drugs—the phenothiazines and the butyrophenones—respectively. While many of the actions and side effects of these drugs are qualitatively similar, they are different quantitatively: that is, in terms of incidence and severity. Which of the following effects or side effects typically occur more frequently, and could be said to be more severe, with haloperidol?

After a few weeks on a drug, a patient reports profound thirst and the production of copious volumes of clear (dilute) urine each day. Which of the following drugs is most likely responsible for the signs and symptoms?

Within days of starting haloperidol treatment for a psychiatric disorder, a young male patient developed severe generalized muscle rigidity and a high fever. In the emergency room he was incoherent, with increased heart rate, hypotension, and diaphoresis, Laboratory studies indicated acidosis, leukocytosis, and increased creatine kinase. The most likely reason for these symptoms is that the patient was suffering from