Estrogens (Conjugated/Equine, Topical)

Dosage Forms

Excipient information presented when available (limited, particularly for generics); consult specific product labeling.

Cream, Vaginal:

Premarin: 0.625 mg/g (30 g) [contains benzyl alcohol, cetyl alcohol, propylene glycol monostearate]

Pharmacology

Mechanism of Action

Conjugated estrogens contain a mixture of estrone sulfate, equilin sulfate, 17 alpha-dihydroequilin, 17 alpha-estradiol and 17 beta-dihydroequilin. Estrogens are responsible for the development and maintenance of the female reproductive system and secondary sexual characteristics. Estradiol is the principle intracellular human estrogen and is more potent than estrone and estriol at the receptor level; it is the primary estrogen secreted prior to menopause. Following menopause, estrone and estrone sulfate are more highly produced. Estrogens modulate the pituitary secretion of gonadotropins, luteinizing hormone, and follicle-stimulating hormone through a negative feedback system; estrogen replacement reduces elevated levels of these hormones in postmenopausal women.

Pharmacokinetics/Pharmacodynamics

Absorption

Systemic absorption occurs

Metabolism

Hepatic via CYP3A4; estradiol is converted to estrone and estriol; also undergoes enterohepatic recirculation (avoided with vaginal administration); estrone sulfate is the main metabolite in postmenopausal women

Excretion

Urine (primarily estriol, also as estradiol, estrone, and conjugates)

Time to Peak

Total estrone: 6 hours

Protein Binding

Binds to sex-hormone-binding globulin and albumin

Use: Labeled Indications

Vulvar and vaginal atrophy associated with menopause: Treatment of atrophic vaginitis and kraurosis vulvae and moderate-to-severe dyspareunia (pain during intercourse) due to vaginal/vulvar atrophy of menopause

Note: The International Society for the Study of Women’s Sexual Health and The North American Menopause Society have endorsed the term genitourinary syndrome of menopause (GSM) as new terminology for vulvovaginal atrophy. The term GSM encompasses all genital and urinary signs and symptoms associated with a loss of estrogen due to menopause (Portman 2014).

Contraindications

Angioedema, anaphylactic reaction or hypersensitivity to conjugated estrogens or any component of the formulation; undiagnosed abnormal genital bleeding; DVT or PE (current or history of); active or history of arterial thromboembolic disease (eg, stroke, MI); breast cancer (known, suspected, or history of); estrogen-dependent tumor (known or suspected); hepatic dysfunction or disease; known protein C, protein S, antithrombin deficiency or other known thrombophilic disorders; pregnancy

Canadian labeling: Additional contraindications (not in US labeling): Endometrial hyperplasia; partial or complete vision loss due to ophthalmic vascular disease; migraine with or without aura

Dosage and Administration

Dosing: Adult

General dosing guidelines: When treating symptoms of menopause, hormone therapy should be evaluated routinely for appropriate dose, duration, and route of administration for each individual patient based on treatment goals, risk factors, and overall health (NAMS 2017). Combined estrogen/progestin therapy is indicated for postmenopausal persons with a uterus to decrease the risk of endometrial cancer. Individuals who have had a hysterectomy generally do not need a progestin; however, one may be needed if there is a history of endometriosis. Adjust dose based on patient response.

Vulvar and vaginal atrophy associated with menopause:

Atrophic vaginitis, kraurosis vulvae: Adult females: Intravaginal: Initial: 0.5 g/day administered cyclically (21 days on, 7 days off). Adjust dose based on patient response (range: 0.5 to 2 g/day).

Moderate-to-severe dyspareunia due to menopause: Adult females: Intravaginal: 0.5 g twice weekly (eg, Monday and Thursday) or once daily cyclically (21 days on, 7 days off)

Dosing: Geriatric

Refer to adult dosing.

Dosing: Pediatric

Labial adhesions: Limited data available: Infants ≥3 months and Children (pre-pubertal): Topical: Cream: Apply once or twice daily; usual duration: 2 to 6 weeks; for recurrence, treatment courses have been repeated with success (Bacon 2015; Cağlar 2007; Kumetz 2006; Muram 1999; Tebruegge 2007)

Administration

Intravaginal: Using applicator provided by the manufacturer, insert cream deeply into vagina. Insertion should be as far as possible into the vagina without causing discomfort. Applicator calibrated in 0.5 g increments up to 2 g. To clean applicator, remove plunger from barrel. Wash with mild soap and warm water; do not boil or use hot water. Allow to dry thoroughly before putting back together.

Storage

Vaginal cream: Store at room temperature of 20°C to 25°C (68°F to 77°F); excursions permitted to 15°C to 30°C (59°F to 86°F).

Drug Interactions

Ajmaline: Estrogen Derivatives may enhance the adverse/toxic effect of Ajmaline. Specifically, the risk for cholestasis may be increased. Monitor therapy

Anastrozole: Estrogen Derivatives may diminish the therapeutic effect of Anastrozole. Avoid combination

Anthrax Immune Globulin (Human): Estrogen Derivatives may enhance the thrombogenic effect of Anthrax Immune Globulin (Human). Monitor therapy

Anticoagulants: Estrogen Derivatives may diminish the anticoagulant effect of Anticoagulants. More specifically, the potential prothrombotic effects of some estrogens and progestin-estrogen combinations may counteract anticoagulant effects. Management: Carefully weigh the prospective benefits of estrogens against the potential increased risk of procoagulant effects and thromboembolism. Use is considered contraindicated under some circumstances. Refer to related guidelines for specific recommendations. Consider therapy modification

Antidiabetic Agents: Hyperglycemia-Associated Agents may diminish the therapeutic effect of Antidiabetic Agents. Monitor therapy

Ascorbic Acid: May increase the serum concentration of Estrogen Derivatives. Monitor therapy

Bosentan: May decrease the serum concentration of CYP3A4 Substrates (High risk with Inducers). Monitor therapy

C1 inhibitors: Estrogen Derivatives may enhance the thrombogenic effect of C1 inhibitors. Monitor therapy

Chenodiol: Estrogen Derivatives may diminish the therapeutic effect of Chenodiol. Management: Monitor clinical response to chenodiol closely when used together with any estrogen derivative. Monitor therapy

CloZAPine: CYP1A2 Inhibitors (Weak) may increase the serum concentration of CloZAPine. Management: Drugs listed as exceptions to this monograph are discussed in further detail in separate drug interaction monographs. Monitor therapy

Corticosteroids (Systemic): Estrogen Derivatives may increase the serum concentration of Corticosteroids (Systemic). Monitor therapy

Cosyntropin: Estrogen Derivatives may diminish the diagnostic effect of Cosyntropin. Management: Discontinue estrogen containing drugs 4 to 6 weeks prior to cosyntropin (ACTH) testing. Consider therapy modification

CYP3A4 Inducers (Moderate): May decrease the serum concentration of CYP3A4 Substrates (High risk with Inducers). Monitor therapy

CYP3A4 Inducers (Strong): May increase the metabolism of CYP3A4 Substrates (High risk with Inducers). Management: Consider an alternative for one of the interacting drugs. Some combinations may be specifically contraindicated. Consult appropriate manufacturer labeling. Consider therapy modification

CYP3A4 Inhibitors (Moderate): May increase the serum concentration of Estrogen Derivatives. Monitor therapy

CYP3A4 Inhibitors (Strong): May increase the serum concentration of Estrogen Derivatives. Monitor therapy

Dabrafenib: May decrease the serum concentration of CYP3A4 Substrates (High risk with Inducers). Management: Seek alternatives to the CYP3A4 substrate when possible. If concomitant therapy cannot be avoided, monitor clinical effects of the substrate closely (particularly therapeutic effects). Consider therapy modification

Dantrolene: Estrogen Derivatives may enhance the hepatotoxic effect of Dantrolene. Monitor therapy

Deferasirox: May decrease the serum concentration of CYP3A4 Substrates (High risk with Inducers). Monitor therapy

Dehydroepiandrosterone: May enhance the adverse/toxic effect of Estrogen Derivatives. Avoid combination

Enzalutamide: May decrease the serum concentration of CYP3A4 Substrates (High risk with Inducers). Management: Concurrent use of enzalutamide with CYP3A4 substrates that have a narrow therapeutic index should be avoided. Use of enzalutamide and any other CYP3A4 substrate should be performed with caution and close monitoring. Consider therapy modification

Erdafitinib: May decrease the serum concentration of CYP3A4 Substrates (High risk with Inducers). Monitor therapy

Exemestane: Estrogen Derivatives may diminish the therapeutic effect of Exemestane. Avoid combination

Hemin: Estrogen Derivatives may diminish the therapeutic effect of Hemin. Avoid combination

Herbs (Estrogenic Properties): May enhance the adverse/toxic effect of Estrogen Derivatives. Monitor therapy

Hyaluronidase: Estrogen Derivatives may diminish the therapeutic effect of Hyaluronidase. Management: Patients receiving estrogens (particularly at larger doses) may not experience the desired clinical response to standard doses of hyaluronidase. Larger doses of hyaluronidase may be required. Consider therapy modification

Immune Globulin: Estrogen Derivatives may enhance the thrombogenic effect of Immune Globulin. Monitor therapy

Indium 111 Capromab Pendetide: Estrogen Derivatives may diminish the diagnostic effect of Indium 111 Capromab Pendetide. Avoid combination

Ivosidenib: May decrease the serum concentration of CYP3A4 Substrates (High risk with Inducers). Monitor therapy

LamoTRIgine: Estrogen Derivatives may decrease the serum concentration of LamoTRIgine. Monitor therapy

Lenalidomide: Estrogen Derivatives may enhance the thrombogenic effect of Lenalidomide. Monitor therapy

Lorlatinib: May decrease the serum concentration of CYP3A4 Substrates (High risk with Inducers). Management: Avoid concurrent use of lorlatinib with any CYP3A4 substrates for which a minimal decrease in serum concentrations of the CYP3A4 substrate could lead to therapeutic failure and serious clinical consequences. Consider therapy modification

Mitotane: May decrease the serum concentration of CYP3A4 Substrates (High risk with Inducers). Management: Doses of CYP3A4 substrates may need to be adjusted substantially when used in patients being treated with mitotane. Consider therapy modification

Mivacurium: Estrogen Derivatives may increase the serum concentration of Mivacurium. Monitor therapy

Nonsteroidal Anti-Inflammatory Agents (COX-2 Selective): May enhance the thrombogenic effect of Estrogen Derivatives. Nonsteroidal Anti-Inflammatory Agents (COX-2 Selective) may increase the serum concentration of Estrogen Derivatives. Monitor therapy

Ospemifene: Estrogen Derivatives may enhance the adverse/toxic effect of Ospemifene. Estrogen Derivatives may diminish the therapeutic effect of Ospemifene. Avoid combination

Pomalidomide: May enhance the thrombogenic effect of Estrogen Derivatives. Management: Canadian pomalidomide labeling recommends caution with use of hormone replacement therapy and states that hormonal contraceptives are not recommended. US pomalidomide labeling does not contain these specific recommendations. Consider therapy modification

ROPINIRole: Estrogen Derivatives may increase the serum concentration of ROPINIRole. Monitor therapy

Sarilumab: May decrease the serum concentration of CYP3A4 Substrates (High risk with Inducers). Monitor therapy

Siltuximab: May decrease the serum concentration of CYP3A4 Substrates (High risk with Inducers). Monitor therapy

Somatropin: Estrogen Derivatives may diminish the therapeutic effect of Somatropin. Shown to be a concern with oral hormone replacement therapy in postmenopausal women. Management: Monitor for reduced growth hormone efficacy. A larger somatropin dose may be required to reach treatment goal. This interaction does not appear to apply to non-orally administered estrogens (e.g., transdermal, vaginal ring). Consider therapy modification

Succinylcholine: Estrogen Derivatives may increase the serum concentration of Succinylcholine. Monitor therapy

Thalidomide: Estrogen Derivatives may enhance the thrombogenic effect of Thalidomide. Monitor therapy

Theophylline Derivatives: CYP1A2 Inhibitors (Weak) may increase the serum concentration of Theophylline Derivatives. Exceptions: Dyphylline. Monitor therapy

Thyroid Products: Estrogen Derivatives may diminish the therapeutic effect of Thyroid Products. Monitor therapy

Tipranavir: Estrogen Derivatives may enhance the dermatologic adverse effect of Tipranavir. The combination of tipranavir/ritonavir and ethinyl estradiol/norethindrone was associated with a high incidence of skin rash. Tipranavir may decrease the serum concentration of Estrogen Derivatives. Management: Women using hormonal contraceptives should consider alternative, non-hormonal forms of contraception. Consider therapy modification

TiZANidine: CYP1A2 Inhibitors (Weak) may increase the serum concentration of TiZANidine. Management: Avoid these combinations when possible. If combined use is necessary, initiate tizanidine at an adult dose of 2 mg and increase in 2 to 4 mg increments based on patient response. Monitor for increased effects of tizanidine, including adverse reactions. Consider therapy modification

Tocilizumab: May decrease the serum concentration of CYP3A4 Substrates (High risk with Inducers). Monitor therapy

Ursodiol: Estrogen Derivatives may diminish the therapeutic effect of Ursodiol. Monitor therapy

Test Interactions

Reduced response to metyrapone test.

Adverse Reactions

Due to systemic absorption, other adverse effects associated with systemic therapy may also occur. Frequency of adverse events reported with daily use.

1% to 10%:

Cardiovascular: Vasodilation (4%)

Central nervous system: Pain (7%)

Gastrointestinal: Abdominal pain (8%)

Genitourinary: Mastalgia (6%), vaginitis (6%)

Neuromuscular & skeletal: Weakness (6%), back pain (5%)

<1%, postmarketing, and/or case reports: Abdominal cramps, abnormal uterine bleeding, acne vulgaris, alopecia, anaphylaxis, application site reaction (application site burning, application site irritation, genital pruritus), arthralgia, bloating, breast hypertrophy, breast tenderness, cerebrovascular accident, change in cervical secretions, change in libido, chloasma, contact lens intolerance, cystitis-like syndrome, decreased glucose tolerance, deep vein thrombosis, dementia, depression, dizziness, dysmenorrhea, dysuria, edema, endometrial carcinoma, endometrial hyperplasia, exacerbation of asthma, fibrocystic breast changes, gallbladder disease, gynecomastia, headache, hirsutism, hypersensitivity reaction, hypertension, increased serum triglycerides, irritability, leg cramps, leukorrhea, malignant neoplasm of breast, migraine, mood disorder, muscle cramps, myocardial infarction, nausea, nervousness, nipple discharge, pelvic pain, polyuria, precocious puberty, pulmonary embolism, retinal thrombosis, skin rash, spotting, urinary tract infection, urinary urgency, urticaria, uterine fibroids (increase in size), vomiting, vulvovaginal disease, weight changes

Warnings/Precautions

Concerns related to adverse effects:

• Anaphylaxis: Anaphylaxis requiring emergency medical management has been reported and may develop at any time during therapy (reported to occur within minutes to hours with oral therapy). Angioedema involving the face, feet, hands, larynx, and tongue has also been reported.
• Breast cancer: [US Boxed Warning]: Based on data from the Women’s Health Initiative (WHI) studies, an increased risk of invasive breast cancer was observed in postmenopausal women using conjugated estrogens (CE) in combination with medroxyprogesterone acetate (MPA). Observational studies noted this risk declines once therapy is discontinued. The WHI study did not observe an increased risk of invasive breast cancer in women with a hysterectomy using CE alone. The risk of breast cancer in postmenopausal patients on hormone therapy may depend upon type of estrogen and/or progestin, dose, timing of therapy initiation, duration of therapy, route of administration, and individual patient characteristics (AACE/ACE [Cobin 2017]; NAMS 2017). Hormone therapy may be associated with increased breast density (NAMS 2017); an increase in abnormal mammogram findings requiring further evaluation has been reported with estrogen alone or in combination with progestin therapy. Estrogen use may lead to severe hypercalcemia in patients with breast cancer and bone metastases; discontinue estrogen if hypercalcemia occurs. Due to increased risks, estrogens are contraindicated in patients with known or suspected breast cancer; however, in appropriately selected patients, low-dose vaginal estrogen that has limited systemic absorption may be considered for the treatment of GSM when non-hormonal treatments are ineffective (ACOG 659 2016; ES [Stuenkel 2015]; NAMS 2017).
• Dementia: [US Boxed Warning]: Estrogens with or without progestin should not be used to prevent dementia. In the Women’s Health Initiative Memory Study (WHIMS), an increased incidence of probable dementia was observed in women ≥65 years of age taking CE alone or in combination with MPA. Because the WHI memory studies were conducted in women ≥65 years of age, it is unknown if these findings apply to younger postmenopausal women. However, hormone therapy is not recommended at any age to prevent or treat cognitive decline or dementia (AACE [Goodman 2011]; NAMS 2017).
• Endometrial cancer: [US Boxed Warning]: The use of unopposed estrogen in women with a uterus is associated with an increased risk of endometrial cancer. The addition of a progestin to estrogen therapy may decrease the risk of endometrial hyperplasia, a precursor to endometrial cancer. Adequate diagnostic measures, including endometrial sampling if indicated, should be performed to rule out malignancy in postmenopausal women with undiagnosed abnormal vaginal bleeding. There is no evidence that the use of natural estrogens results in a different endometrial risk profile than synthetic estrogens at equivalent estrogen doses. The risk of endometrial cancer appears to be dose and duration dependent, greatest with use ≥5 years, and may persist following discontinuation of therapy. The use of a progestin is not generally required when low doses of estrogen are used locally for vaginal atrophy, although long term data (>1 year) supporting this recommendation are lacking (NAMS 2013; NAMS 2017). The increased risks of cancer outcomes associated with systemic estrogen or estrogen/progestin therapy may not be the same with low dose vaginal estrogen (Crandall 2018). When non-hormonal treatments are not effective for GSM, low dose vaginal therapy that has limited systemic absorption may be considered in appropriately selected patients with endometrial cancer (ES [Stuenkel 2015]; NAMS 2017).
• Endometriosis: Estrogens may exacerbate endometriosis. Malignant transformation of residual endometrial implants has been reported posthysterectomy with unopposed estrogen therapy. Consider adding a progestin in women with residual endometriosis posthysterectomy.
• Lipid effects: Estrogen compounds are generally associated with lipid effects such as increased HDL-cholesterol and decreased LDL-cholesterol. Triglycerides may also be increased in women with preexisting hypertriglyceridemia; discontinue if pancreatitis occurs.
• Ovarian cancer: Available information related to the use of menopausal estrogen or estrogen/progestin therapy and risk of ovarian cancer is inconsistent. If an association is present, the absolute risk is likely rare and may be influenced by duration of therapy (AACE [Goodman 2011]; ES [Stuenkel 2015]; NAMS 2017).
• Retinal vascular thrombosis: Estrogens may cause retinal vascular thrombosis; discontinue if migraine, loss of vision, proptosis, diplopia, or other visual disturbances occur; discontinue permanently if papilledema or retinal vascular lesions are observed on examination.

Disease-related concerns:

• Asthma: Use caution in patients with asthma; may exacerbate disease.
• Carbohydrate intolerance: May impair glucose tolerance; use caution in patients with diabetes. Prior to therapy, consider age, cardiovascular and metabolic risk factors in patients previously diagnosed with diabetes (AACE/ACE [Cobin 2017]).
• Cardiovascular disease: [US Boxed Warning]: Estrogens with or without progestin should not be used to prevent cardiovascular disease. Using data from the Women’s Health Initiative (WHI) studies, an increased risk of deep vein thrombosis (DVT) and stroke has been reported with CE and an increased risk of DVT, stroke, pulmonary emboli (PE) and myocardial infarction (MI) has been reported with CE with MPA in postmenopausal women 50 to 79 years of age. Additional risk factors include diabetes mellitus, hypercholesterolemia, hypertension, SLE, obesity, tobacco use, and/or history of venous thromboembolism (VTE). Risk factors should be managed appropriately; discontinue use immediately if adverse cardiovascular events occur or are suspected. Due to possible lower risk of thrombotic events, transdermal administration may be preferred for treating vasomotor symptoms of menopause in patients with risk factors for cardiovascular disease (AACE/ACE [Cobin 2017]; ACOG 556 2013; ES [Stuenkel 2015]). Use is contraindicated in women with active DVT, PE, arterial thromboembolic disease (stroke and MI), or a history of these conditions. The increased risks of cardiovascular outcomes associated with systemic estrogen or estrogen/progestin therapy may not be the same with low dose vaginal estrogen (Crandall 2018).
• Diseases exacerbated by fluid retention: Use with caution in patients with diseases which may be exacerbated by fluid retention, including cardiac or renal dysfunction.
• Epilepsy: Use caution with epilepsy; may exacerbate disease.
• Gallbladder disease: Use of postmenopausal estrogen may be associated with an increased risk of gallbladder disease requiring surgery.
• Hepatic dysfunction: Estrogens are poorly metabolized in patients with hepatic dysfunction. Use caution with a history of cholestatic jaundice associated with prior estrogen use or pregnancy. Discontinue if jaundice develops or if acute or chronic hepatic disturbances occur. Use is contraindicated with hepatic impairment or disease.
• Hepatic hemangiomas: Use with caution in patients with hepatic hemangiomas.
• Hereditary angioedema: Exogenous estrogens may exacerbate angioedema symptoms in women with hereditary angioedema.
• Hypoparathyroidism: Use caution in patients with hypoparathyroidism; estrogen induced hypocalcemia may occur.
• Migraine: Use caution with migraine; may exacerbate disease.
• Porphyria: Use with caution in patients with porphyria; may exacerbate disease.
• SLE: Use with caution in patients with SLE; may exacerbate disease.

Concurrent drug therapy issues:

• Drug-drug interactions: Potentially significant interactions may exist, requiring dose or frequency adjustment, additional monitoring, and/or selection of alternative therapy. Consult drug interactions database for more detailed information.
• Thyroid replacement therapy: Estrogens may increase thyroid-binding globulin (TBG) levels leading to increased circulating total thyroid hormone levels. Women on thyroid replacement therapy may require higher doses of thyroid hormone while receiving estrogens.

Special populations:

• Surgical patients: Whenever possible, estrogens should be discontinued at least 4 to 6 weeks prior to elective surgery associated with an increased risk of thromboembolism or during periods of prolonged immobilization.

Dosage form specific issues:

• Benzyl alcohol and derivatives: Some dosage forms may contain benzyl alcohol; large amounts of benzyl alcohol (≥99 mg/kg/day) have been associated with a potentially fatal toxicity (“gasping syndrome”) in neonates; the “gasping syndrome” consists of metabolic acidosis, respiratory distress, gasping respirations, CNS dysfunction (including convulsions, intracranial hemorrhage), hypotension and cardiovascular collapse (AAP ["Inactive" 1997]; CDC 1982); some data suggests that benzoate displaces bilirubin from protein binding sites (Ahlfors 2001); avoid or use dosage forms containing benzyl alcohol with caution in neonates. See manufacturer’s labeling.
• Vaginal cream: Use of the vaginal cream may weaken latex found in condoms, diaphragms or cervical caps. Systemic absorption occurs following vaginal use; warnings, precautions, and adverse events observed with oral therapy should be considered.

Other warnings/precautions:

• Genitourinary syndrome of menopause: Low-dose vaginal estrogen is preferred over systemic therapy for genitourinary syndrome of menopause (GSM) in the absence of vasomotor symptoms due to increased efficacy and decreased systemic effects (eg, cardiovascular effects, cancer risk) (Crandall 2018; NAMS 2013; NAMS 2017).
• Laboratory changes: The use of estrogens and/or progestins may change the results of some laboratory tests (eg, coagulation factors, lipids, glucose tolerance, binding proteins). The dose, route, and the specific estrogen/progestin influences these changes.
• Risks vs benefits: When used for the relief of menopausal symptoms, the benefit-risk of hormone therapy is most favorable if started in patients who have no contraindications to therapy, are <60 years of age, within 10 years of menopause onset, have a favorable lipid profile, and do not have the factor V Leiden genotype or metabolic syndrome. Risk factors for cardiovascular disease should also be considered when evaluating therapy and route of administration (AACE/ACE [Cobin 2017]; NAMS 2017). [US Boxed Warning]: Estrogens with or without progestin should be used for the shortest duration possible at the lowest effective dose consistent with treatment goals and risks for the individual woman. Patients should be reevaluated as clinically appropriate to determine if treatment is still necessary. Available data related to treatment risks are from Women’s Health Initiative (WHI) studies, which evaluated oral CE 0.625 mg with or without MPA 2.5 mg relative to placebo in postmenopausal women. Other combinations and dosage forms of estrogens and progestins were not studied. Outcomes reported from clinical trials using CE with or without MPA should be assumed to be similar for other doses and other dosage forms of estrogens and progestins until comparable data becomes available.

Monitoring Parameters

Prior to therapy, baseline risk for breast cancer and CVD. During therapy, age appropriate breast and pelvic exams; blood pressure; unscheduled bleeding lasting >6 months for endometrial pathology (sooner in patients who are obese, diabetic, or have a history of endometrial cancer); serum triglycerides (2 weeks after starting therapy in patients with baseline level >200 mg/dL); TSH (6 to 12 weeks after starting oral therapy in patients taking thyroid replacement); efficacy beginning 1 to 3 months after starting therapy, then every 6 to 12 months as appropriate. Duration of treatment should be evaluated at least annually (ES [Stuenkel 2015]).

Note: Monitoring of FSH and serum estradiol is not useful when managing GSM.

Pregnancy

Pregnancy Considerations

Use is contraindicated during pregnancy.

In general, the use of estrogen and progestin as in combination hormonal contraceptives have not been associated with teratogenic effects when inadvertently taken early in pregnancy. Use of the vaginal cream may weaken latex found in condoms, diaphragms, or cervical caps.

Patient Education

What is this drug used for?

• It is used to prevent or lower the signs of the change of life (menopause).
• It is used to treat vaginal irritation and dryness.
• It may be given to you for other reasons. Talk with the doctor.

Frequently reported side effects of this drug

• Hair loss
• Nausea
• Vomiting
• Abdominal cramps
• Bloating
• Dark patches on face

Other side effects of this drug: Talk with your doctor right away if you have any of these signs of:

• Severe cerebrovascular disease like change in strength on one side is greater than the other, trouble speaking or thinking, change in balance, or vision changes.
• Blood clots like numbness or weakness on one side of the body; pain, redness, tenderness, warmth, or swelling in the arms or legs; change in color of an arm or leg; chest pain; shortness of breath; fast heartbeat; or coughing up blood.
• Liver problems like dark urine, fatigue, lack of appetite, nausea, abdominal pain, light-colored stools, vomiting, or yellow skin.
• Gallstones like pain in the upper right abdominal area, right shoulder area, or between the shoulder blades; yellow skin; or fever with chills.
• Pancreatitis like severe abdominal pain, severe back pain, severe nausea, or vomiting.
• Severe headache
• Severe dizziness
• Passing out
• Pelvic pain
• Vision changes
• Blindness
• Bulging eyes
• Contact lens discomfort
• Lump in breast
• Breast soreness or pain
• Nipple discharge
• Abnormal vaginal bleeding
• Vaginal pain, itching, and discharge
• Severe vaginal irritation
• Swelling
• Trouble with memory
• Signs of a significant reaction like wheezing; chest tightness; fever; itching; bad cough; blue skin color; seizures; or swelling of face, lips, tongue, or throat.

Note: This is not a comprehensive list of all side effects. Talk to your doctor if you have questions.

Consumer Information Use and Disclaimer: This information should not be used to decide whether or not to take this medicine or any other medicine. Only the healthcare provider has the knowledge and training to decide which medicines are right for a specific patient. This information does not endorse any medicine as safe, effective, or approved for treating any patient or health condition. This is only a brief summary of general information about this medicine. It does NOT include all information about the possible uses, directions, warnings, precautions, interactions, adverse effects, or risks that may apply to this medicine. This information is not specific medical advice and does not replace information you receive from the healthcare provider. You must talk with the healthcare provider for complete information about the risks and benefits of using this medicine.