hi, thanks for using HCM, Melacare Cream (Hydroquinone/Tretinoin/Mometasone) is a topical cream containing 3 active ingredients, which work together to treat swelling, itchiness and redness caused by dermatitis and various other skin conditions. The active ingredient hydroquinone can lighten dark patches of skin by preventing the process in the skin that causes discoloration. Tretinoin is a retinoid, which is able to reduce the appearance of fine wrinkles, and is also sometimes used to treat acne. The third ingredient, mometasone, is a corticosteroid which reduces swelling and inflammation. side effects are: Mild skin rash, burning, irritation, or redness Thinning or more sensitive skin Numb or tingling skin Swollen hair follicles Spider veins or more prominent appearance of sub dermal arteries Blisters, pimples, or other blemishes Stretch marks More serious and rare side effects that may need medical attention are: Fatigue or muscle weakness Unusual weight gain or swelling Blurry vision Severe mood changes (Depression, anxiety, or suicidal thoughts) Insomnia, nightmares, or other sleep disturbance wishing you good health..