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Repeated USMLE Questions Step 1- Review- 65- Pharmacology

Q- Which one of the following antibiotics is effective against beta-lactamase-producing organisms and can penetrate the blood brain barrier (BBB)?

A- Amoxicillin

B- Cefazolin

C- Imipenem

D- Ticarcillin

C- Imipenem- It is the only one of these choices that penetrate the BBB and eventually is effective against BLP organisms.



Q- Which one of the following is the mechanism of action of losartan to slow the progression of heart failure?

A- ACE inhibitor

B- Angiotensin receptor antagonist

C- Beta-adrenergic blocker

D- Calcium channel blocker

B- Angiotensin receptor antagonist- It slows the progression of heart failure but it has no effect on cardiac contractility.



Q- Which one of the following antiarrhythmic medications may cause discoloration of the skin, photosensitivity, pulmonary and thyroid complications?

A- Amiodarone

B- Diltiazem

C- Procainamide

D- Propranolol

A- Amiodarone- It is the only one on the list that has a variety of side effects including those mentioned in the question.



More Pharmacology MCQs

Read The Topics on First Aid USMLE Step 1 

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