Following inhibits Cytochrome P450_____________?

Correct answer: A. Cimetidine

  • A. Cimetidine
  • B. Famotidine
  • C. Ranitidine
  • D. All of the above

Explanation

Cimetidine strongly inhibits several hepatic cytochrome P450 enzymes and can raise concentrations of interacting drugs. Famotidine has minimal CYP inhibition, while ranitidine is much weaker, so “all of the above” is incorrect.

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