Oral contraceptive failure occurs with
(Rifampicin) (1628 - Man & Gillmann) (741-KDT 6th)CONTRACEPTION FAILURE - May occure if the following drugs are used concurrently(a) Enzyme inducers - Phenytoin, Phenobarbitone, Primidone, Carbamazepine, Rifampicin, Rifabutin(b) Suppression of intestinal micro flora - Tetracyclines Ampicilline Doxycycilline
Cimetidine
Rifampicin
Morphine
Ethanol
Endocrinology