Srivastava K, Sinha P, Sharma R, Gupta U. A comparative study of the effect of drotaverine hydrochloride with hyoscine butylbromide in first stage of labor. Int J Basic Clin Pharmacol [Internet]. 2017 Jan. 18 [cited 2025 Oct. 24];4(3):488-91. Available from: https://www.ijbcp.com/index.php/ijbcp/article/view/773