Kumar, A., and J. Batra. “Evaluation of the Safety and Efficacy of Codeine Phosphate and Chlorpheniramine Maleate in a Fixed Dose Composition for the Management of Dry Cough in Adults: An Open Label Phase IV Clinical Trial”. International Journal of Basic & Clinical Pharmacology, vol. 12, no. 1, Dec. 2022, pp. 22-28, doi:10.18203/2319-2003.ijbcp20222982.