List of NDC products with proprietary name panretin. This medication is used to treat skin sores in patients with a certain type of AIDS-related cancer (Kaposi's sarcoma). Alitretinoin belongs to a class of medications called retinoids. It works by affecting the growth of skin cells. This medication should not be used when medications taken by mouth are needed to treat the Kaposi's sarcoma (e.g., more than 10 new skin sores in the previous month, disease affects the lungs or other organs).