Mcyl Tablet is used to treat psoriasis (scaly, itchy, and red patches on the skin), or vitiligo (discoloured patches in different areas of the body, including the skin, hair). It contains Methoxsalen, which is used alongside ultraviolet-A radiation. It works by reducing the number of cells the skin makes. It may cause side effects such as erythema (skin redness), oedema (swelling), blisters on the skin, and itching. Before using this medicine, you should tell your doctor if you are allergic to any of its components or if you are pregnant/breastfeeding, and about all the medications you are taking and pre-existing medical conditions.