Substance used a bleaching agent in melasma is ?: (A) Hydroquinone, (B) Hydroxychloroquin, (C) Hydrogen peroxide, (D) Benzoyl peroxide
Answer is A. Ans. is'a' i.e., Hydroquinone (Ref : IADVL textbook of dermatology 3'd /e p. 1607) Depigmenting agents (Bleaching agents):Hydroquinone 2-5%Ascorbic acidRetinoidsLiquorice extractAzelaic acid (10-20%)Kozic acid (1-4%)ArbutinNicotinamide