Trioxasalen is a photosensitive medication used with UV-A rays. It works by activating certain skin cells (melanocytes) and helps repigment the discolored, white patches in vitiligo. Trioxasalen also slows down the rapid growth of skin cells in psoriasis. This reduces scaling and thickening of the skin.
Common side effects
Erythema (skin redness), Blisters on skin, Edema (swelling), Itching