Questions and Answers for Medical Students- Pharmacology- 3

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Q- A 45-year-old man with hypertension and benign prostatic hyperplasia (BPH) is started on a new medication that improves urinary symptoms but causes dizziness when standing. Which of the following drugs is most likely responsible?

A- Atenolol

B- Furosemide

C- Prazosin

D- Enalapril

C- Prazosin- Prazosin is an α₁-adrenergic blocker used for BPH and hypertension. It causes orthostatic hypotension, especially after the first dose.

 

Q- A 25-year-old man with a history of seizures is taking phenytoin. Which of the following is a major side effect of this medication?

A- Pulmonary fibrosis

B- Gingival hyperplasia

C- Hypoglycemia

D- Parkinsonism

B- Gingival hyperplasia- Phenytoin causes gingival hyperplasia due to increased PDGF activity, along with hirsutism and megaloblastic anemia.

 

Q- A 23-year-old woman is prescribed isotretinoin for severe cystic acne. What is the most important precaution before initiating therapy?

A- Check for anemia

B- Assess liver function after therapy

C- Screen for TB

D- Perform pregnancy test

D- Perform pregnancy test- Isotretinoin is highly teratogenic. A negative pregnancy test and effective contraception are required before, during, and after treatment.

 

Pharmacology MCQs for Medical and Pharmacy Students 

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