General Info:

Norethindrone Acetate (Aygestin) contains a type of female hormone known as progesterone. It is used to restore menstruation in women who have stopped having menstrual cycles (also called amenorrhea). Norethindrone Acetate (Aygestin) can also help treat endometriosis, a condition where the endometrium (the lining of the uterus) doesn't shed properly and attaches to the outside of the uterus or other areas such as the ovaries or bowels. Norethindrone Acetate (Aygestin) also helps control unusual and heavy bleeding of the uterus caused by hormonal imbalance. However, the drug is not used to control bleeding caused by fibroids or cancer.

To prevent abnormal uterine bleeding due to hormonal imbalance or to restore menstrual periods, the usual dose is 2.5 to 10 milligrams a day taken for 5 to 10 days during the second half of a 28-day cycle. Your period should start 3 to 7 days after you stop taking Norethindrone Acetate (Aygestin).

To treat endometriosis the recommended starting dose is 5 milligrams a day for 2 weeks. The doctor may increase your dose by 2.5 milligrams a day every 2 weeks up to a maximum of 15 milligrams a day. Treatment may continue for 6 to 9 months or until intolerable breakthrough bleeding occurs.