“Formulation, Development & Evaluation of Matrix Type Transdermal Patch of Xanthine Oxidase Inhibitor (Allopurinol)”, IJFANS, vol. 11, no. 11, pp. 4168–4181, Jan. 2022, Accessed: Aug. 09, 2026. [Online]. Available: https://www.ijfans.org/index.php/Journal/article/view/12060