Tretinoin

Tretinoin is a form of vitamin A (all-trans retinoic acid) used in both dermatology and oncology. In dermatology, tretinoin is used to treat acne, pigmentation, and signs of photoaging by promoting skin cell turnover, unclogging pores, and reducing inflammation. It improves skin texture, evens out skin tone, and helps in the treatment of comedones. In oncology, tretinoin is used for the treatment of acute promyelocytic leukemia (APL) by promoting the maturation of malignant blood cells and inducing remission. Tretinoin is available as topical creams and gels for external use and as oral capsules in oncology under strict medical supervision.

Wikipedia page List of medicines with this active substance