MEGESTONE 10 MG TABLET is similar to the progesterone hormone naturally produced by the body. It regulates periods, stops irregular bleeding, and helps with withdrawal bleeding in cases of amenorrhea (unusual stopping of menstrual periods). MEGESTONE 10 MG TABLET should be taken as your doctor's advice. Your doctor will decide how much you need to take and for how much time. You may take it with or without food but better to take it at a fixed time. You should take this medication for as long as it is recommended for you. The most common side effects of this medication include headache, abdominal pain, weakness, and dizziness. If any of these bothers you, let your doctor know. There may be ways of reducing or preventing them. It may also cause irregular periods, bleeding, or spotting in between menstrual periods. Let your doctor know if this occurs frequently.