estradiol, norethindrone, and relugolix (Myfembree)

Brand Names: Myfembree

Generic Name: estradiol, norethindrone, and relugolix

What is estradiol, norethindrone, and relugolix (Myfembree) (Myfembree)?

Estradiol, norethindrone, and relugolix (Myfembree) is used to control heavy menstrual bleeding cause by uterine fibroids in premenopausal women.

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

What are the possible side effects of Myfembree (Myfembree)?

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

Stop taking this medicine and get emergency medical help if you have signs of a heart attack or stroke: chest pain spreading to your jaw or shoulder, sudden numbness or weakness on one side of the body, slurred speech, severe headache, vision problems, bulging eyes, leg pain or swelling, feeling short of breath.

Stop using this medicine and call your doctor at once if you have:

May cause hair loss or thinning hair. Talk to your doctor if you have concerns about this side effect.

Common side effects 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.

What is the most important information I should know about this medicine (Myfembree)?

Using this medicine can increase your risk of blood clots, stroke, or heart attack. You are even more at risk if you are over 35 years of age, you smoke, and you have uncontrolled high blood pressure.

Smoking can greatly increase your risk of blood clots, stroke, or heart attack. You should not use this medicine if you smoke and are older than 35 years of age.

Stop taking this medicine and get medical help at once if you have signs of a heart attack or stroke: chest pain, sudden numbness or weakness, slurred speech, severe headache, vision problems, leg pain or swelling, feeling short of breath.

What should I discuss with my healthcare provider before taking Myfembree (Myfembree)?

You should not use Myfembree if you are allergic to estradiol, norethindrone, or relugolix, or if you have:

  • untreated or uncontrolled high blood pressure;
  • heart problems (heart valve disorder or heart rhythm disorder);
  • a history of heart attack, stroke, or blood clot;
  • blood circulation problems;
  • an increased risk of having blood clots due to a hereditary blood disorder;
  • diabetes with damage to your kidneys, eyes, nerves, or blood vessels;
  • a history of hormone-related cancer, or cancer of the breast, uterus/cervix, or vagina;
  • unusual vaginal bleeding that has not been checked by a doctor;
  • severe migraine headaches (with aura, numbness, weakness, or vision changes), especially if you are older than 35;
  • osteoporosis; or
  • liver disease.

Tell your doctor if you have ever had:

You may need to have a negative pregnancy test before starting this treatment.

May cause a miscarriage. Do not use if you are pregnant. Stop using this medicine and tell your doctor if you become pregnant. Use birth control while using estradiol, norethindrone, and relugolix and for at least 1 week after your last dose.

To prevent pregnancy, use a barrier form of birth control: condom, diaphragm, cervical cap, or contraceptive sponge. Hormonal birth control (birth control pills, injections, implants, skin patches, vaginal rings) can make Myfembree less effective or increase side effects.

It may be harder to tell you are pregnant because this medicine may decrease menstrual bleeding. Watch for other signs of pregnancy such as nausea, breast tenderness, and weight gain.

You should not breastfeed while using Myfembree.

How should I take Myfembree (Myfembree)?

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

Myfembree is usually taken as soon as possible after the start of a menstrual period, but no later than 7 days after the period has started.

Take the medicine at the same time each day, with or without food.

Your period may be heavy or irregular for the first month, but bleeding should then decrease.

Your doctor may also want you to take calcium and vitamin D supplements, or an iron supplement. Avoid iron within 2 hours before or after you take calcium or vitamin D.

You may need an occasional bone x-ray called a DXA scan to check your bone mineral density.

Myfembree can affect the results of certain medical tests. Tell any doctor who treats you that you are using estradiol, norethindrone, and relugolix.

If you need major surgery or will be on long-term bed rest, you may need to stop using this medicine for a short time. Any doctor or surgeon who treats you should know that you are using Myfembree.

You should not take this medicine for longer than 24 months.

Store at room temperature away from moisture and heat.

Do not keep leftover Myfembree. Ask your pharmacist about a drug take-back program. Do not flush the unused medicine down the toilet.


Vaginal yeast infections are caused by bacteria. See Answer

What happens if I miss a dose (Myfembree)?

Take the missed dose on the same day you remember it. Take your next dose at the regular time and stay on your once-daily schedule. Do not use 2 doses in one day.

What happens if I overdose (Myfembree)?

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

Overdose may cause nausea, vomiting, breast tenderness, and stomach pain.

What should I avoid while taking Myfembree (Myfembree)?

Follow your doctor's instructions about any restrictions on food, beverages, or activity.

What other drugs will affect Myfembree (Myfembree)?

Some drugs can affect your blood levels of other drugs you take, which may increase side effects or make the medications less effective.

Take your Myfembree dose 6 hours before taking other medications, especially:

This list is not complete and many other drugs may affect Myfembree. This includes prescription and over-the-counter medicines, vitamins, and herbal products. Tell your doctor about all your other medicines. Not all possible drug interactions are listed here.

Where can I get more information (Myfembree)?

Your pharmacist can provide more information about Myfembree (estradiol, norethindrone, and relugolix).

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.
Every effort has been made to ensure that the information provided by Cerner Multum, Inc. ('Multum') is accurate, up-to-date, and complete, but no guarantee is made to that effect. Drug information contained herein may be time sensitive. Multum information has been compiled for use by healthcare practitioners and consumers in the United States and therefore Multum does not warrant that uses outside of the United States are appropriate, unless specifically indicated otherwise. Multum's drug information does not endorse drugs, diagnose patients or recommend therapy. Multum's drug information is an informational resource designed to assist licensed healthcare practitioners in caring for their patients and/or to serve consumers viewing this service as a supplement to, and not a substitute for, the expertise, skill, knowledge and judgment of healthcare practitioners. The absence of a warning for a given drug or drug combination in no way should be construed to indicate that the drug or drug combination is safe, effective or appropriate for any given patient. Multum does not assume any responsibility for any aspect of healthcare administered with the aid of information Multum provides. The information contained herein is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. If you have questions about the drugs you are taking, check with your doctor, nurse or pharmacist.

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Reviewed on 10/12/2022

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