Efficacy and safety of fixed dose combination of drotaverine hydrochloride (80 mg) and mefenamic acid (250 mg) versus mefenamic acid (250mg) alone in treatment of primary dysmenorrhea : double-blind, randomised comparative study. Journal title: Journal of the Indian Medical Association Authors: JB Sharma, Alka Kriplani, Sunesh Kumar, KK Roy, Sona Dharmendra, Eshani Sharma, P Vanamail Subject(s):