Description and Brand Names
Drug information provided by: Merative, Micromedex®
US Brand Name
- Ortho Micronor
Norethindrone is used to prevent pregnancy. It works by stopping a woman's egg from fully developing each month. The egg can no longer accept a sperm and fertilization (pregnancy) is prevented.
Norethindrone is also used to treat secondary amenorrhea (absence of menstrual periods in women who have previously had a menstrual period who are not pregnant), endometriosis, and irregular menstrual periods caused by hormonal imbalance.
No contraceptive method is 100 percent effective. Birth control methods such as having surgery to become sterile or not having sex are more effective than birth control pills. Discuss your options for birth control with your doctor.
This medicine does not protect against HIV infection or other sexually transmitted diseases. It will not help as emergency contraception, such as after unprotected sexual contact.
This medicine is available only with your doctor's prescription.
This product is available in the following dosage forms:
Portions of this document last updated: May 01, 2023
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