Puram, Mounika, and Ambika Patil. “Drotaverine Hydrochloride and Valethamate Bromide Action in Management of Labor”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology 13, no. 12 (November 28, 2024): 3648–3653. Accessed November 25, 2025. https://www.ijrcog.org/index.php/ijrcog/article/view/14803.