A 20 years old nulliparous women is an oral contraceptives pills. She is currently diagnosed as having pulmonary tuberculosis which anti-tuberculous drug decreases the effect of OCP.
Rifampicin is known to be an hepatic enzyme inducer hence is not used in conjunction with ocps. Other inducer agents are long term alcohol abuse. rifampicin. anticonvulsants, paicularly phenytoin,carbamazepine,phenobarbitone and primidone. spironolactone. griseofulvin
INH
Pyrazinamide
Ethambutol
Rifampicin
Contraceptives