The anticoagulant action of Warfarin is potentiated by all except_____________?
Correct answer: D. B & C
- A. Phenylbutazone
- B. Vitamin K
- C. Rifampicin
- D. B & C
Explanation
Phenylbutazone can potentiate warfarin, whereas vitamin K reverses its action and rifampicin induces hepatic metabolism, reducing its effect. Thus both B and C are exceptions, making option D the appropriate combined answer.
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