Estradiol / Norethindrone / Relugolix Dosage

Medically reviewed by Drugs.com. Last updated on Jun 20, 2023.

Usual Adult Dose for Endometriosis

1 tablet orally once a day
Total duration of therapy: 24 months

Comments:

• Exclude pregnancy and discontinue hormonal contraceptives prior to use.
• Start this drug as early as possible after onset of menses but no later than 7 days after menses has started.
• Assess bone mineral density at baseline and then periodically or annually thereafter.
• Limit duration due to potential risk of irreversible bone loss.

Uses:

• For the management of heavy menstrual bleeding associated with uterine leiomyomas (fibroids) in premenopausal women
• For the management of moderate to severe pain associated with endometriosis in premenopausal women

Usual Adult Dose for Uterine Fibroids

1 tablet orally once a day
Total duration of therapy: 24 months

Comments:

• Exclude pregnancy and discontinue hormonal contraceptives prior to use.
• Start this drug as early as possible after onset of menses but no later than 7 days after menses has started.
• Assess bone mineral density at baseline and then periodically or annually thereafter.
• Limit duration due to potential risk of irreversible bone loss.

Uses:

• For the management of heavy menstrual bleeding associated with uterine leiomyomas (fibroids) in premenopausal women
• For the management of moderate to severe pain associated with endometriosis in premenopausal women

Usual Adult Dose for Menstrual Disorders

1 tablet orally once a day
Total duration of therapy: 24 months

Comments:

• Exclude pregnancy and discontinue hormonal contraceptives prior to use.
• Start this drug as early as possible after onset of menses but no later than 7 days after menses has started.
• Assess bone mineral density at baseline and then periodically or annually thereafter.
• Limit duration due to potential risk of irreversible bone loss.

Uses:

• For the management of heavy menstrual bleeding associated with uterine leiomyomas (fibroids) in premenopausal women
• For the management of moderate to severe pain associated with endometriosis in premenopausal women

Renal Dose Adjustments

Data not available

Liver Dose Adjustments

Liver dysfunction or disease: Contraindicated
Acute liver test abnormalities: May require discontinuation until liver tests return to normal and causation has been excluded

Comments:

• The use of estradiol in patients with liver dysfunction is expected to increase the exposure of estradiol and increase the risk of estradiol-related side effects. Frequent monitoring recommended.

Dose Adjustments

Concomitant Use with Oral P-gp Inhibitors: Use should be avoided.

• If concomitant use is unavoidable, this drug should be administered first, and dosing should be separated by at least 6 hours.

Precautions

US BOXED WARNING:

• THROMBOEMBOLIC DISORDERS AND VASCULAR EVENTS: Estrogen and progestin combination products (including this drug) increase the risk of thrombotic or thromboembolic disorders (including pulmonary embolism, deep vein thrombosis, stroke, myocardial infarction), especially in women at increased risk for these events. This drug is contraindicated in women with current or history of thrombotic or thromboembolic disorders and in women at increased risk for these events (including women over 35 years of age who smoke, women with uncontrolled hypertension).

CONTRAINDICATIONS:

• Women with high risk of arterial, venous thrombotic, or thromboembolic disorders; examples include women over 35 years of age who smoke, and women who are known to have:
• current or history of deep vein thrombosis or pulmonary embolism
• vascular disease (e.g., cerebrovascular disease, coronary artery disease, peripheral vascular disease)
• thrombogenic valvular or thrombogenic rhythm diseases of the heart (e.g., subacute bacterial endocarditis with valvular disease, atrial fibrillation)
• inherited or acquired hypercoagulopathies
• uncontrolled hypertension
• headaches with focal neurological symptoms or migraine headaches with aura if over 35 years of age
• Women who are pregnant
• Women with known osteoporosis (due to risk of further bone loss)
• Women with current or history of breast cancer or other hormone-sensitive malignancies, and with increased risk for hormone-sensitive malignancies
• Women with known hepatic impairment or disease
• Women with undiagnosed abnormal uterine bleeding
• Women with known anaphylactic reaction, angioedema, or hypersensitivity to any active component or to any of the ingredients

Safety and efficacy have not been established in patients younger than 18 years.

Consult WARNINGS section for additional precautions.

Dialysis

Data not available

Other Comments

Administration advice:

• Administer this drug at about the same time each day, with or without food.
• If using an oral P-gp inhibitor, administer this drug first and separate dosing by at least 6 hours.
• Missed dose: Take as soon as possible on the same day and then resume regular dosing the next day at usual time; do not double up doses.

Storage requirements:

• Store at 15C to 30C (59F to 86F).

General:

• Each tablet contains estradiol 1 mg, norethindrone acetate 0.5 mg, and relugolix 40 mg.
• Limitations of Use: Use of this drug should be limited to 24 months due to the risk of continued bone loss which may not be reversible.
• The impact of bone mineral density (BMD) decreases on long-term bone health and future fracture risk in premenopausal women is unknown.
• To monitor the outcomes of pregnant women exposed to this combination drug, a pregnancy registry has been established. Pregnant women and health care providers are encouraged to call 1-855-428-0707.

Monitoring:

• Cardiovascular: Blood pressure in patients with well-controlled hypertension
• General: For pregnancy (before starting therapy or if pregnancy is suspected)
• Metabolic: Blood glucose in patients with diabetes or prediabetes; lipid levels
• Musculoskeletal: BMD assessment by dual-energy x-ray absorptiometry (DXA) scan at baseline and then periodically in women with heavy menstrual bleeding associated with uterine fibroids, or annually in women with moderate to severe pain associated with endometriosis.
• Psychiatric: Mood changes or depressive symptoms shortly after treatment initiation

Patient advice:

• Read the US FDA-approved patient labeling (Patient Information).
• If a dose is missed, take it as soon as possible the same day and then resume regular dosing the next day at the usual time; if you do not remember until the next day, do not take the missed dose. Do not take 2 doses at once to make up for a missed dose.
• Supplementary calcium and vitamin D may be beneficial if dietary intake is not adequate; do not take oral iron supplementation at the same time as calcium and vitamin D.
• Seek immediate medical attention for suicidal ideation and behavior; promptly seek medical attention for new onset/worsening depression, anxiety, or other mood changes.
• Promptly seek medical attention if signs/symptoms develop that may reflect liver injury (e.g., jaundice, right upper abdominal pain).
• Contact physician if severe bleeding and/or cramping occurs during therapy.
• Patients of childbearing potential: Use effective nonhormonal contraception during therapy and for 1 week after the last dose; discontinue this drug if pregnancy is confirmed.
• Contact health care provider if concerned about change to your hair.
• Dispose of unused medication properly; do not flush it down the toilet.

Further information

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

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