Failure of OCP is caused by
Rifampicin
Nevirapine
Phenytoin
AH of the above
Ans-D A clinical guide to Contraception Leon speroffDrugs causing failure of OCPRifampicinRifabutinPhenytoinNevirapinePhenobarbitoneTopiramateVigabatrinCarbamazepineEthosuximideGriseofulvin