Question

Nifedipine contains _____ ring system.

• A. Piperidine
• B. Phenothiazine
• C. Pyrimidine
• D. Dihydro pyridine

Hint:

All "-dipine" drugs (Nifedipine, Amlodipine) are Dihydropyridines.

Answer 1

The Correct Option is D

Step 1: Concept
Nifedipine is a calcium channel blocker used to treat hypertension and angina.

Step 2: Meaning
It belongs to a specific chemical class of drugs defined by their heterocyclic core.

Step 3: Analysis
The chemical structure of nifedipine is 1,4-dihydropyridine with phenyl and ester substitutions. It does not contain piperidine (fully saturated) or pyrimidine (two nitrogens) rings.

Step 4: Conclusion
Thus, nifedipine is a derivative of the dihydropyridine ring system.

Final Answer: (D)