Xtralite Ointment falls under a category of medications which includes Hydroquinone Tretinoin and Fluocinolone acetonide This ointment is applied directly on the skin Its mechanism of action involves Hydroquinone lightening dark skin patches Tretinoin aiding in skin peeling and renewal and Fluocinolone acetonide reducing inflammation It is important to use this medication according to the dosage and duration prescribed by your doctor