Hydroquinone+Tretinoin is used in the treatment of melasma.

Hydroquinone + Tretinoin is a combination of two medicines: Hydroquinone and Tretinoin which treat melasma (dark spots on skin). Hydroquinone is a steroid medicine. It blocks the production of certain chemical messengers (prostaglandins) that make the skin red, swollen and itchy. Tretinoin is a form of vitamin A that helps the skin to renew itself more quickly.

Most side effects do not require any medical attention and disappear as your body adjusts to the medicine. Consult your doctor if they persist or if you’re worried about them