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What is norethisterone?

Norethisterone is no longer available in the United States.

Norethisterone is a progestin, which is a form of progesterone. Norethisterone, also known as norethindrone, impedes growth of the uterine lining, while at the same time encourages the production of certain hormones by the uterus. It is used in several ways. In small doses, it is used is as a contraceptive. Another use for norethisterone is to treat endometriosis. Norethisterone has been used to treat bleeding of abnormal menstruation, and it can be used to regulate a menstrual cycle that has been abnormal for six months or more in non-pregnant or pre-menopausal women. Testing with norethisterone can determine if certain hormones that affect the uterus are being produced by your body.

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