Which of the following causes OCP failure?
ANSWER: (B) RifampicinREF: KDT 7th ed p. 317Contraceptive failure of OCP can occur if concurrently used with followingEnzyme inducers:By increase metabolism of OCRSSuppression of microbial flora: interfere with enterohepatic circulation* Phenytoin* Phenobarbitone* Primidone* Carbamezapine* Rifampidn* Tetracyclines* Ampiciliins
Carbamazepine
Rifampicin
NSAIDS
Ethambutol
Pharmacokinetics