Dr. N.Thamaraiselvan Natarajan, K.Priya verthini Kanagarathinam. “A Study on Factors Influencing Purchase of OTC Analgesic Drugs”. International Journal of Advanced Science and Technology 29, no. 08 (June 6, 2020): 5087-5110. Accessed September 28, 2021. https://sersc.org/journals/index.php/IJAST/article/view/26842.