Medicine Dubin Johnson syndrome is characterised by all except A It is characterized by defective bilirubin excretion into the bile. B It’s a result of mutation in MRP-2. C Rifampicin may reduce MRP-2 mutation. D Oral contraceptives are not contraindicated in this disease. 💡 Explanation Dubin Johnson syndrome is characterised by all except ✓ Correct Answer: D. Oral contraceptives are not contraindicated in this disease.