Uses of This Medicine. Medroxyprogesterone is used to treat amenorrhea (unusual stopping of menstrual periods) and abnormal uterine bleeding. It is also used to prevent endometrial hyperplasia (thickening of the lining of the uterus or womb) in women who are taking conjugated estrogens.edroxyprogesterone is used to treat amenorrhea (unusual stopping of menstrual periods) and abnormal uterine bleeding. It is also used to prevent endometrial hyperplasia (thickening of the lining of the uterus or womb) in women who are taking conjugated estrogens.