Mechanism of action of nifidipine is_____________?
Correct answer: A. It has a prominent smooth muscle relaxant action causes arteolar dilation leading to fall in blood pressure
- A. It has a prominent smooth muscle relaxant action causes arteolar dilation leading to fall in blood pressure
- B. Nifidipine depresses the SA node thus decreasing mycocoardial excitability
- C. Mainly depression of A-V conduction
- D. Decreased cardiac output thus decreasing load on myocardium
Explanation
Nifedipine blocks L-type calcium channels predominantly in vascular smooth muscle, causing arteriolar dilation and a fall in systemic blood pressure. Unlike verapamil, it does not primarily depress the SA node or AV conduction.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
Practise Cardiovascular Drugs
55 free Cardiovascular Drugs MCQs from Pharmacology, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Pharmacology questions like this
Pharmacology is on 7 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Cardiovascular Drugs questions
The mechanism of action of sodium nitroprusside is_____________?
Quindine is used to treat______________?
The following drugs are useful in hypertension except_____________?
All are true about nitric oxide, EXCEPT____________?
Cloidogrel is an______________?
The toxic effect of Beta receptor antagonists includes all the following EXCEPT____________?