Drug Interactions between elagolix / estradiol / norethindrone and relugolix

Elagolix may significantly increase the blood levels of relugolix. This may increase the risk and/or severity of side effects such as hot flushes; weight gain; decreased sex drive; erectile function difficulties; muscle and joint pain; constipation; diarrhea; increases in glucose, triglyceride (fat), and liver enzyme levels; and decreased hemoglobin levels. Combining these medications may also increase the risk of an irregular heart rhythm that may be serious and potentially life-threatening, although it is a relatively rare side effect. Talk to your doctor if you have any questions or concerns. Your doctor may be able to prescribe alternatives that do not interact, or you may need a dose adjustment or more frequent monitoring to safely use both medications. If you do have to take both medications, you should take relugolix first, then take elagolix after at least 6 hours to minimize the effects of the interaction. You should seek immediate medical attention if you develop sudden dizziness, lightheadedness, fainting, shortness of breath, or heart palpitations during treatment with these medications, whether together or alone. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.

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Estradiol and other estrogen-containing medications may reduce the effectiveness of elagolix in treating your condition. If you require contraception, it is recommended that you use a non-hormonal form of contraception during treatment with elagolix and for one week after its discontinuation. Talk to your doctor if you have any questions or concerns. Your doctor may be able to prescribe alternatives that do not interact. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.

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Elagolix may reduce the blood levels and effects of norethindrone. If you are using low-dose oral contraceptives, you may have an increased risk of breakthrough bleeding and unintended pregnancy. You should discuss the use of alternative or additional methods of birth control with your healthcare provider. If you take hormone replacement for menopause, notify your doctor if your medication is no longer controlling your symptoms or you experience abnormal bleeding. You may need a dose adjustment or more frequent monitoring by your doctor to safely use both medications. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.

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