Repeated USMLE Questions Step 1- Pharmacology MCQs- 302

Q- Which one of the following medications is used in cases of schizophrenia to treat involuntary movements caused by the use of antipsychotics such as haloperidol?

A- Benztropine

B- Chlorpromazine

C- Lamotrigine

D- Sertraline


The correct answer is A

Benztropine is an anticholinergic drug that can prevent muscle spasms that may be caused by antipsychotic drugs. Chlorpromazine is another antipsychotic that can lead to the same side effects. Lamotrigine is used for seizures and sertraline is SSRI antidepressant.

Q- Which one of the following agents is a muscarinic cholinomimetic?

A- Atropine

B- Hexamethonium

C- Pilocarpine

D- Tubocurarine


The correct answer is C

Atropine blocks muscarinic receptors while hexamethonium and tubocurarine, are ganglionic blockers.


Q- Which one of the following drugs can be used as a patch to avoid sea sickness?

A- Adrenaline

B- Digoxin

C- Nicotine

D- Scopolamine


The correct answer is D

Scopolamine is used to treat motion sickness and postsurgical nausea and vomiting. It is used in the form of patches as a prophylactic against motion sickness. Its common side effects are sleepiness and dry mouth.

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