Optimization Formula of Caffeine Nano-EMULGEL using Isopropyl Myristate and Isopropanol as Penetration Enhancer and Evaluation on its Penetration in Vitro. Sci Prcd Ser [Internet]. 2025 Sep. 10 [cited 2026 May 11];6(1):13-4. Available from: https://readersinsight.net/index.php/SPS/article/view/3281