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Norethindrone

Generic name: norethindrone [ nor-eth-IN-drone ]
Brand names: Camila, Deblitane, Errin, Gallifrey, Heather, ... show all 19 brands
Dosage form: oral tablet (0.35 mg; acetate 5 mg)
Drug classes: Contraceptives, Progestins

Medically reviewed by Drugs.com on Oct 28, 2024. Written by Cerner Multum.

What is norethindrone?

Norethindrone is a form of progesterone, a female hormone important for regulating ovulation and menstruation.

Norethindrone is used for birth control (contraception) to prevent pregnancy.

Norethindrone is also used to treat menstrual disorders, endometriosis, or abnormal vaginal bleeding caused by a hormone imbalance.

Not all brands of norethindrone are for the same uses. Some brands are for use only as contraception. Others are for use in treating endometriosis or vaginal bleeding disorders. Avoid medication errors by using only the brand, form, and strength your doctor prescribes.

Norethindrone may also be used for other purposes not listed in this medication guide.

Norethindrone side effects

Get emergency medical help if you have signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.

Norethindrone may cause serious side effects. Call your doctor at once if you have:

Common side effects of norethindrone may include:

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

Norethindrone side effects (more detail)

Warnings

You should not use norethindrone if you you have: undiagnosed vaginal bleeding, breast cancer, liver disease, or a liver tumor. You may not be able to take norethindrone if you have ever had a heart attack, a stroke, or blood clot.

Do not use if you are pregnant or trying to become pregnant.

In some cases, you should not take norethindrone if you are nursing.

Before taking this medicine

You should not use norethindrone if you are allergic to it, or if you have:

Do not use norethindrone if you are pregnant or trying to become pregnant. Stop taking the medicine and tell your doctor right away if you become pregnant.

Ask your doctor about using this medicine while you are breast-feeding. In some cases, you should not take norethindrone if you are nursing.

Tell your doctor if you have ever had:

Do not give this medicine to a child without medical advice.

How should I take norethindrone?

Follow all directions on your prescription label and read all medication guides or instruction sheets. Use the medicine exactly as directed.

Carefully follow your doctor's dosing instructions about when to start taking norethindrone for contraception if you are switching from a combination birth control pill (estrogen and progestin).

If you take norethindrone for contraception: Take one pill every day, no more than 24 hours apart. You may get pregnant if you do not take one pill daily.

You may need to use back-up birth control (such as condoms with spermicide) if you are sick with vomiting or diarrhea, or if you are 3 or more hours late in taking your daily dose.

If you take norethindrone for menstrual disorders or abnormal vaginal bleeding: You will most likely take the medicine for only 5 to 10 days. Vaginal bleeding will occur 3 to 7 days after your last dose.

If you take norethindrone for endometriosis: Norethindrone is usually taken daily long-term for several months. Your doctor may occasionally change your dose.

Your doctor should check your progress on a regular basis. Self-examine your breasts for lumps on a monthly basis, and have regular mammograms.

Report any unusual vaginal bleeding right away.

Norethindrone can affect the results of certain medical tests. Tell any doctor who treats you that you are using norethindrone.

Store this medication at room temperature away from moisture, heat, and light.

Norethindrone dosing information

Usual Adult Dose for Abnormal Uterine Bleeding:

2.5 to 10 mg orally once a day
Duration of therapy: 5 to 10 days

Comments:
-This drug should be used when the endometrium is adequately primed with endogenous/exogenous estrogen.
-Withdrawal bleeding typically occurs within 3 to 7 days of treatment discontinuation.

Use: Treatment of secondary amenorrhea and abnormal uterine bleeding due to hormonal imbalance without organic pathology (e.g., submucous fibroids, uterine cancer)

Usual Adult Dose for Amenorrhea:

2.5 to 10 mg orally once a day
Duration of therapy: 5 to 10 days

Comments:
-This drug should be used when the endometrium is adequately primed with endogenous/exogenous estrogen.
-Withdrawal bleeding typically occurs within 3 to 7 days of treatment discontinuation.

Use: Treatment of secondary amenorrhea and abnormal uterine bleeding due to hormonal imbalance without organic pathology (e.g., submucous fibroids, uterine cancer)

Usual Adult Dose for Contraception:

0.35 mg orally once a day

Comment:
-This drug should be taken at the same time each day.

Use: Prevention of pregnancy

Usual Adult Dose for Endometriosis:

Initial dose: 5 mg orally once a day for 2 weeks
-Maximum dose: 15 mg/day

Comments:
-The dose should be increased by 2.5 mg/day every 2 weeks until 15 mg is reached.
-Treatment may continue for 6 to 9 months OR until annoying breakthrough bleeding demands temporary termination.

Uses: Treatment of endometriosis

Usual Pediatric Dose for Contraception:

Postpubertal adolescents (under 16 years): 0.35 mg orally once a day

Comments:
-This drug should be used after menarche occurs.
-The dose should be taken at the same time each day.

Use: Prevention of pregnancy

Detailed Norethindrone dosage information

Premarin, progesterone, megestrol, leuprolide, levonorgestrel, medroxyprogesterone, Yaz, Provera, Depo Provera, Lupron Depot

What happens if I miss a dose?

Call your doctor for instructions, or follow the patient instructions provided with your medicine.

Missing a birth control pill increases your risk of becoming pregnant. If you are more than 3 hours late for your dose, take the medicine as soon as you remember and use back-up birth control for at least 48 hours. Take your next pill at the regularly scheduled time and continue on your regular dosing schedule.

If you miss a period for two months in a row, call your doctor because you might be pregnant.

What happens if I overdose?

Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.

An overdose of norethindrone is not expected to be dangerous.

What should I avoid while taking norethindrone?

Do not use estrogen medication unless your doctor tells you to.

Avoid smoking. It can greatly increase your risk of blood clots, stroke, or heart attack while taking norethindrone for contraception.

Norethindrone will not protect you from sexually transmitted diseases--including HIV and AIDS. Using a condom is the only way to protect yourself from these diseases.

What other drugs will affect norethindrone?

Some drugs can make norethindrone less effective, which may result in unintended pregnancy if you use norethindrone for contraception. Tell your doctor about all your other medicines, especially:

This list is not complete. Other drugs may affect norethindrone, including prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible drug interactions are listed here.

Norethindrone drug interactions (more detail)

Does norethindrone interact with my other drugs?

Enter medications to view a detailed interaction report using our Drug Interaction Checker.

Further information

Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

Medical Disclaimer

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