Questions and Answers for Medical Students- Pharmacology- 5

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Q- A 70-year-old patient with atrial fibrillation is prescribed digoxin. Which of the following findings suggests toxicity?

A- Bradycardia and yellow vision

B- Diarrhea and flushing

C- Muscle twitching and dry mouth

D- Tremor and hyperthermia

A- Bradycardia and yellow vision- Digoxin toxicity presents with GI upset, bradycardia, and xanthopsia (yellow vision). It is worsened by hypokalemia.

 

Q- A 30-year-old man develops flushing after taking niacin for hyperlipidemia. What mechanism causes this side effect?

A- Acetylcholine release

B- Catecholamine excess

C- Histamine release

D- Prostaglandin-mediated vasodilation

D- Prostaglandin-mediated vasodilation- Niacin-induced flushing is due to prostaglandin release; pretreatment with aspirin can prevent this effect.

 

Q- Which of the following drugs is a β₁-selective blocker useful in treating hypertension in patients with asthma?

A- Carvedilol

B- Labetalol

C- Metoprolol

D- Propranolol

C- Metoprolol- Metoprolol selectively blocks β₁ receptors, minimizing bronchoconstriction risk in asthmatic patients.

 

Read this book: Pharmacology MCQs for Medical and Pharmacy Students 

 

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