Nikhil Bhardwaj, Dheeraj Kumar, Atul Kumar Nasa, and Poonam Arora. 2026. “Comparative Study of Regulatory Guidelines for Over-the-Counter (OTC) Drugs in India, the United States, and Europe”. The Bioscan 21 (3):682-93. https://doi.org/10.63001/tbs.2026.v21.i03.pp682-693.