Formulation of Gastroretentive Microballoons of Metoprolol Succinate Using Acetylated Cocoyam (Xanthosoma sagittifolium) Starch as a Sustained Release Polymer. East Cent. Afr. J. Pharm. Sci. [Internet]. 2023 Mar. 28 [cited 2026 Jun. 14];25(1):17-30. Available from: http://jsep.uonbi.ac.ke/ojs/index.php/ecajps/article/view/1455