Huo Q, Guo C, Gu T, Liu W. Study on Sustained-Release Tablets of Tramadol Hydrochloride. ajc [Internet]. 2014 Jul. 16 [cited 2024 Jul. 23];26(15):4723-7. Available from: https://asianpubs.org/index.php/ajchem/article/view/26_16_40