Pharmacology Oral Contraceptive failure occurs in a patient on Rifampicin because of: A Rifampicin induce the metabolism of contraceptive B Rifampicin stimulates gonadotropin release from pituitary C Rifampicin decrease the secretion of progestin D Rifampicin antagonize the action of oral contraceptive 💡 Explanation Oral Contraceptive failure occurs in a patient on Rifampicin because of: ✓ Correct Answer: A. Rifampicin induce the metabolism of contraceptive