Nikhil Bhardwaj, Dheeraj Kumar, Atul Kumar Nasa, and Poonam Arora. “Comparative Study of Regulatory Guidelines for Over-the-Counter (OTC) Drugs in India, the United States, and Europe”. The Bioscan 21, no. 3 (August 18, 2026): 682–693. Accessed August 25, 2026. https://thebioscan.com/index.php/pub/article/view/6488.