Gynaecology & Obstetrics OCP’s efficiency is reduced by simultaneous use of:a) Rifampicinb) Carbamazepinec) Propranolold) Tricyclic antidepressants A ab B a C ad D bc 💡 Explanation OCP's efficiency is reduced by simultaneous use of:a) Rifampicinb) Carbamazepinec) Propranolold) Tricyclic antidepressants ✓ Correct Answer: A. ab