<prompt> All are true about rifampicin EXCEPT ?Microsomal enzyme inducerUsed in treatment of meningiococcal meningitisMay cause OCP failureBactericidal in nature  <response>: Ans. is b i.e., Used in treatment of meningiococcal meningitis o Rifampicin is used for prophylaxis of meningococal meningittis not for treatment. o Other three options are correct. 