DESCRIPTION. Oxsoralen Lotion is a clear, colorless to straw colored liquid with an odor of acetone. Each ml. of Oxsoralen Lotion contains 10 mg. methoxsalen in an inert vehicle containing alcohol (71% v/v), propylene glycol, acetone, and purified water. Consumer information about the medication methoxsalen (8-MOP, Oxsoralen Ultra), a medication prescribed to treat psoriasis, vitiligo, and T-cell lymphoma. Side effects, drug interactions, warnings, and pregnancy and breastfeeding information is provided. UVADEX® (methoxsalen) Sterile Solution should be used only by physicians who have special competence in the diagnosis and treatment of cutaneous T-cell lymphoma and who have special training and experience in the THERAKOS® UVAR XTS® or THERAKOS® CELLEX® Photopheresis System. Uses. This medication is used along with controlled ultraviolet light (UVA) to help control severe psoriasis. Methoxsalen works by making the skin more sensitive to UVA light. Methoxsalen works by enhancing the body's sensitivity to ultraviolet light A (UVA). Methoxsalen is used in combination with UVA light therapy to treat severe psoriasis. Methoxsalen (also called xanthotoxin, marketed under the trade names Oxsoralen, Deltasoralen, Meladinine) is a drug used to treat psoriasis, eczema, vitiligo, and some cutaneous lymphomas in conjunction with exposing the skin to UVA light from lamps or sunlight. Methoxsalen is used in the treatment of vitiligo,psoriasis. view methoxsalen’s uses, side-effects, drug interactions, expert advice and user faqs only on 1mg.com. Methoxsalen works by enhancing the body's sensitivity to ultraviolet light A (UVA). Methoxsalen injection is used with UVA light therapy to treat skin lesions caused by cutaneous T-cell lymphoma. Methoxsalen treats only the skin symptoms of CTCL but does not treat lymphoma.