This cream contains three active ingredients Fluocinolone Acetonide, Hydroquinone and Tretinoin. All of them are used to treat melasma. However, the mechanism of action of the active ingredients in This cream in the treatment of melasma is unknown but Fluocinolone Acetonide is a corticosteroid for topical dermatological use and is classified therapeutically as an anti-inflammatory. Hydroquinone is classified therapeutically as a depigmenting agent, which may interrupt one or more steps in the tyrosine-tyrosinase pathway of melanin synthesis. Tretinoin is classified therapeutically as a keratolytic agent.