(es tra DYE ole)
- Estradiol Acetate
- Estradiol Transdermal
- Estradiol Valerate
- Vivelle Dot
Excipient information presented when available (limited, particularly for generics); consult specific product labeling. [DSC] = Discontinued product
EC-RX Estradiol: 0.4% (30 g, 60 g); 0.6% (30 g, 60 g) [contains cetearyl alcohol]
Emulsion, Transdermal, as hemihydrate:
Estrasorb: 4.35 mg/1.74 g (1.74 g [DSC]) [contains polysorbate 80, soybean oil]
Divigel: 0.25 mg/0.25 g (1 ea); 0.5 mg/0.5 g (1 ea); 1 mg/g (1 g) [contains propylene glycol, trolamine (triethanolamine)]
Elestrin: 0.06% (26 g) [contains edetate disodium, propylene glycol, trolamine (triethanolamine)]
Estrogel: 0.06% (50 g) [contains alcohol, usp, trolamine (triethanolamine)]
Oil, Intramuscular, as cypionate:
Depo-Estradiol: 5 mg/mL (5 mL)
Oil, Intramuscular, as valerate:
Delestrogen: 10 mg/mL (5 mL) [contains chlorobutanol (chlorobutol), sesame oil]
Delestrogen: 20 mg/mL (5 mL); 40 mg/mL (5 mL) [contains benzyl alcohol]
Generic: 10 mg/mL (5 mL [DSC]); 20 mg/mL (5 mL); 40 mg/mL (5 mL)
Patch Twice Weekly, Transdermal:
Alora: 0.025 mg/24 hr (1 ea, 8 ea); 0.05 mg/24 hr (1 ea, 8 ea); 0.075 mg/24 hr (1 ea, 8 ea); 0.1 mg/24 hr (1 ea, 8 ea)
Minivelle: 0.025 mg/24 hr (8 ea); 0.0375 mg/24 hr (8 ea); 0.05 mg/24 hr (8 ea); 0.075 mg/24 hr (8 ea); 0.1 mg/24 hr (8 ea)
Vivelle-Dot: 0.025 mg/24 hr (1 ea, 8 ea); 0.0375 mg/24 hr (1 ea, 8 ea); 0.05 mg/24 hr (1 ea, 8 ea); 0.075 mg/24 hr (1 ea, 8 ea); 0.1 mg/24 hr (1 ea, 8 ea)
Generic: 0.025 mg/24 hr (8 ea); 0.0375 mg/24 hr (8 ea); 0.05 mg/24 hr (1 ea, 8 ea); 0.075 mg/24 hr (8 ea); 0.1 mg/24 hr (8 ea)
Patch Weekly, Transdermal:
Climara: 0.025 mg/24 hr (4 ea); 0.0375 mg/24 hr (4 ea); 0.05 mg/24 hr (1 ea, 4 ea); 0.06 mg/24 hr (4 ea); 0.075 mg/24 hr (4 ea); 0.1 mg/24 hr (1 ea, 4 ea)
Menostar: 14 mcg/24 hr (4 ea)
Generic: 0.025 mg/24 hr (1 ea, 4 ea); 0.0375 mg/24 hr (4 ea); 0.05 mg/24 hr (1 ea, 4 ea); 0.06 mg/24 hr (4 ea); 0.075 mg/24 hr (4 ea); 0.1 mg/24 hr (1 ea, 4 ea)
Ring, Vaginal, as acetate:
Femring: 0.05 mg/24 hr (1 ea); 0.1 mg/24 hr (1 ea)
Evamist: 1.53 mg/spray (8.1 mL)
Estrace: 0.5 mg, 1 mg, 2 mg [scored]
Generic: 0.5 mg, 1 mg, 2 mg
Brand Names: U.S.
- EC-RX Estradiol
- Estrasorb [DSC]
- Estrogen Derivative
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.
Well absorbed from the gastrointestinal tract, mucous membranes, and the skin. Average serum estradiol concentrations (Cavg) vary by product
Injection: Estradiol valerate and estradiol cypionate are absorbed over several weeks following IM injection
Alora: Cavg: 41 to 98 pg/mL
Climara: Cavg: 22 to 106 pg/mL
Divigel: Cavg: 9.8 to 30.5 pg/mL
Elestrin: Cavg: 15.4 to 39.2 pg/mL; Exposure increased by 55% with application of sunscreen 10 minutes prior to dose
Estrasorb: Mean serum concentration on day 22 of therapy: ~35 to 65 pg/mL; Exposure increased by ~38% with application of sunscreen 10 minutes prior to estradiol 8.7 mg and exposure increased by ~46% when sunscreen was applied 25 minutes after estradiol application.
Estrogel: Cavg on day 14 of therapy: 28.3 pg/mL. Cmax of estradiol is altered by repeated daily application (for 7 days) of sunscreen (decreased by 16%) or lotion (increased by 73%) when applied 1 hour after the dose.
Evamist: Cavg: 19.6 to 30.9 pg/mL
Menostar: Cavg: 13.7 pg/mL
Vivelle-Dot: Cavg: 34 to 104 pg/mL
Vaginal (Femring): Rapid during the first hour following application, then declines to a steady rate over 3 months; Cavg: 40.6 to 76 pg/mL
Widely distributed; high concentrations in the sex hormone target organs
Hepatic; partial metabolism via CYP3A4 enzymes; estradiol is reversibly converted to estrone and estriol; oral estradiol also undergoes enterohepatic recirculation by conjugation in the liver, followed by excretion of sulfate and glucuronide conjugates into the bile, then hydrolysis in the intestine and estrogen reabsorption. Sulfate conjugates are the primary form found in postmenopausal women. With transdermal application, less estradiol is metabolized leading to higher circulating concentrations of estradiol and lower concentrations of estrone and conjugates.
Primarily urine (as estradiol, estrone, estriol and their glucuronide and sulfate conjugates)
Bound to sex hormone-binding globulin and albumin
Use: Labeled Indications
Breast cancer, metastatic: Treatment of metastatic breast cancer (palliation) in appropriately selected men and postmenopausal women.
Hypoestrogenism (female ): Treatment of hypoestrogenism due to hypogonadism, castration, or primary ovarian failure
Osteoporosis prevention (female): Prevention of postmenopausal osteoporosis
Limitations of use: For use only in women at significant risk of postmenopausal osteoporosis; consider use of nonestrogen medications.
Prostate cancer, advanced: Treatment of androgen dependent advanced prostatic cancer (palliation)
Vasomotor symptoms associated with menopause: Treatment of moderate to severe vasomotor symptoms associated with menopause.
Vulvar and vaginal atrophy associated with menopause: Treatment of moderate to severe vulvar and vaginal atrophy associated with menopause.
Limitations of use: When used solely for the treatment of vulvar and vaginal atrophy, topical vaginal products should be considered.
Angioedema, anaphylactic reaction, or hypersensitivity to estradiol 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), except in appropriately selected patients being treated for metastatic disease; estrogen-dependent tumor (known or suspected); hepatic impairment or disease; known protein C, protein S, antithrombin deficiency or other known thrombophilic disorders; pregnancy.
Documentation of allergenic cross-reactivity for estrogens is limited. However, because of similarities in chemical structure and/or pharmacologic actions, the possibility of cross-sensitivity cannot be ruled out with certainty.
Canadian labeling: Additional contraindications (not in US labeling): Note: May be dosage form dependent (consult product labeling): Breastfeeding; endometrial hyperplasia; active thrombophlebitis; partial or complete loss of vision or diplopia due to ophthalmic vascular disease; presence or history of hepatic tumors (benign or malignant); porphyria; classical migraine.
Note: Estrasorb has been discontinued in the US for more than 1 year.
General dosing guidelines: When treating postmenopausal women, use estrogens for the shortest duration possible at the lowest effective dose consistent with treatment goals. Reevaluate patients as clinically appropriate to determine if treatment is still necessary. Consider use of an estrogen with a progestin in postmenopausal women with a uterus. Women who have had a hysterectomy generally do not need a progestin; however, one may be needed if there is a history of endometriosis. Dosage needs to be adjusted based upon the patient's response.
Breast cancer, metastatic: Oral (Estrace): Males and postmenopausal females: 10 mg 3 times/day or (off-label dosing) postmenopausal women: 2 mg 3 times/day (Ellis 2009)
Hypoestrogenism (female) due to hypogonadism, castration, or primary ovarian failure:
Oral (Estrace): 1 to 2 mg/day; titrate as necessary to control symptoms using minimal effective dose for maintenance therapy
IM: Valerate (Delestrogen): 10 to 20 mg every 4 weeks
Transdermal (Alora, Climara, Vivelle-Dot): Refer to transdermal product-specific dosing (below).
Hypoestrogenism (female) due to hypogonadism: IM: Cypionate (Depo-Estradiol): 1.5 to 2 mg monthly
Osteoporosis prevention (females):
Oral (Estrace): Lowest effective dose has not been determined; doses of 0.5 mg/day in a cyclic regimen for 23 days of a 28-day cycle were used in clinical studies
Transdermal (Alora, Climara, Menostar, Minivelle, Vivelle-Dot): Refer to transdermal product-specific dosing (below).
Prostate cancer, advanced:
IM: Valerate (Delestrogen): 30 mg or more every 1 to 2 weeks
Oral (Estrace): 1 to 2 mg 3 times/day
Vasomotor symptoms associated with menopause: Note: Attempt to taper or discontinue at 3- to 6-month intervals
Oral (Estrace): 1 to 2 mg daily, adjusted as necessary to limit symptoms; administration should be cyclic (3 weeks on, 1 week off)
IM: Cypionate (Depo-Estradiol): 1 to 5 mg every 3 to 4 weeks
IM: Valerate (Delestrogen): 10 to 20 mg every 4 weeks
Topical emulsion (Estrasorb): 3.48 g applied once daily in the morning
Divigel: Initial: 0.25 g/day; adjust dose based on patient response.
Elestrin: Initial: 0.87 g/day applied at the same time each day; adjust dose based on patient response.
EstroGel: 1.25 g/day applied at the same time each day
Topical spray (Evamist): Initial: One spray (1.53 mg) per day. Adjust dose based on patient response. Dosing range: 1 to 3 sprays per day.
Transdermal (Alora, Climara, Minivelle, Vivelle-Dot): Refer to transdermal product-specific dosing (below).
Vaginal ring (Femring): Initial: 0.05 mg intravaginally; following insertion, dose is released daily for 3 months. Usual dose: 0.05 mg to 0.1 mg intravaginally every 3 months.
Vulvar and vaginal atrophy associated with menopause:
IM: Valerate (Delestrogen): 10 to 20 mg every 4 weeks. Attempt to taper or discontinue at 3- to 6-month intervals.
Intravaginal: Vaginal ring (Femring): Initial: 0.05 mg intravaginally; following insertion, dose is released daily for 3 months. Usual dose: 0.05 mg to 0.1 mg intravaginally every 3 months. Attempt to taper or discontinue at 3- to 6-month intervals.
Oral (Estrace): 1 to 2 mg/day; administration should be cyclic (3 weeks on, 1 week off). Attempt to taper or discontinue at 3- to 6-month intervals
Topical gel (EstroGel): 1.25 g/day applied at the same time each day
Transdermal (Alora, Climara, Vivelle-Dot): Refer to transdermal product-specific dosing (below).
Transdermal product-specific dosing:
Note: Indicated dose may be used continuously in patients without a uterus. Continuous or cyclic schedules (3 weeks on, 1 week off) may be used in women with a uterus (indication and product specific; refer to manufacturers labeling). When changing patients from oral to transdermal therapy, start transdermal patch 1 week after discontinuing oral hormone (may begin sooner if symptoms reappear within 1 week):
Hypoestrogenism (female) due to hypogonadism, castration, or primary ovarian failure: Adjust dose as necessary to control symptoms.
Alora: Initial: Initial: Apply 0.05 mg/day patch twice weekly.
Climara: Initial: Apply 0.025 mg/day patch once weekly.
Vivelle-Dot: Initial: Apply 0.025 mg/day patch twice weekly.
Osteoporosis prevention (female):
Alora, Minivelle, Vivelle-Dot: Initial: Apply 0.025 mg/day patch twice weekly. Adjust dose as necessary.
Climara: Initial: Apply 0.025 mg/day patch once weekly; adjust dosage based on response to therapy.
Estradot [Canadian product]: There are no specific initial dosage recommendations provided in the manufacturer′s labeling; individualize dose per clinical status, bone mineral density (BMD) status and 17-beta estradiol levels (maintain levels at 50 picogram/mL).
Menostar: Apply 0.014 mg/day patch once weekly. In women with a uterus, also administer a progestin for 14 days every 6 to 12 months.
Vasomotor symptoms associated with menopause: Note: Adjust dose as necessary. Attempt to taper or discontinue at 3- to 6-month intervals.
Alora, Estradot [Canadian product]: Initial: Apply 0.05 mg/day patch twice weekly.
Climara: Initial: Apply 0.025 mg/day patch once weekly.
Minivelle, Vivelle-Dot: Initial: Apply 0.0375 mg/day patch twice weekly.
Oesclim [Canadian product]: Initial: Apply 0.025 to 0.05 mg/day patch twice weekly.
Vulvar and vaginal atrophy associated with menopause: Note: Adjust dose as necessary. Attempt to taper or discontinue at 3- to 6-month intervals.
Alora: Initial: Apply 0.05 mg/day patch twice weekly.
Climara: Initial: Apply 0.025 mg/day patch once weekly.
Vivelle-Dot: Initial: Apply 0.0375 mg/day patch twice weekly.
Refer to adult dosing.
Dosing: Renal Impairment
For most products, there are no dosage adjustments provided in the manufacturer’s labeling (has not been studied).
Dosing: Hepatic Impairment
Use is contraindicated with hepatic dysfunction or disease
The use of a progestin should be considered when administering estrogens to postmenopausal women with a uterus.
Injection formulation: Intramuscular use only.
Estradiol cypionate: Shake or gently warm vial to redissolve crystals that may have formed during storage.
Estradiol valerate: Should be injected into the upper outer quadrant of the gluteal muscle; administer with a dry needle (solution may become cloudy with wet needle).
Emulsion (Estrasorb): For topical use only; not for ophthalmic, oral, or vaginal use. Do not apply to face or breasts. Apply to clean, dry skin while in a sitting position. Contents of two pouches (total 3.48 g) are to be applied individually, once daily in the morning. Apply contents of first pouch to left thigh; massage into skin of left thigh and calf until thoroughly absorbed. Apply contents of second pouch to the right thigh; massage into skin of right thigh and calf until thoroughly absorbed. Wash hands with soap and water after application. Allow skin to dry before covering legs with clothing.
Gel: Apply to clean, dry, unbroken skin at the same time each day. Wash hands after application. Gel is flammable; avoid fire or flame until skin is dry.
Divigel: Do not apply to face, breasts, vaginal area or irritated skin. The entire contents of packet should be applied to right or left upper thigh each day (alternate sites). Apply over an area ~5 x 7 inches. Do not wash application site for 1 hour. Allow gel to dry before dressing.
Elestrin: Do not apply to breasts or vaginal area. The entire dose should be applied to upper arm and shoulder area using two fingers to spread gel. Allow skin to dry for ≥5 minutes prior to dressing. Prior to first use, pump must be primed. After priming, the pump contains 30 metered doses; discard pump after 30 doses even though container may not be empty. If >1 dose is needed, wait 5 seconds before pumping next dose. To avoid secondary exposure, do not allow others to contact the application site for 2 hours after gel is applied. Allow at least 2 hours between applying gel and going swimming. Wait at least 25 minutes before applying sunscreen to application area. When sunscreen and gel are applied to the same site for >7 consecutive days, the absorption of estradiol is increased; do not apply sunscreen to an area where the gel was applied for ≥7 consecutive days.
EstroGel: Do not apply to breasts or vaginal area. Apply dose into the palm of hand and then apply gel to the other arm, from the wrist to the shoulder. Spread gel as thinly as possible over one arm but do not massage or rub in gel. Allow skin to dry for 5 minutes before dressing. Prior to first use, pump must be primed. After priming, the pump contains 32 daily doses (50 g canister) or 14 daily doses (25 g canister). Discard pump after allotted doses even though container may not be empty. To avoid secondary exposure, do not allow others to contact the application site for ≥1 hour after gel is applied. Wait as long as possible between applying gel and going swimming.
Spray: Evamist: Prior to first use, prime pump by spraying 3 sprays with the cover on. To administer dose, hold container upright and vertical and rest the plastic cone flat against the skin while spraying. Spray to the inner surface of the forearm, starting near the elbow. If more than one spray is needed, apply to adjacent but not overlapping areas. Apply at the same time each day. Allow spray to dry for ~2 minutes; do not rub into skin; do not cover with clothing until dry. Do not wash application site for at least 60 minutes. Apply to clean, dry, unbroken skin. Do not apply to skin other than that of the forearm. Make sure that children do not come in contact with any skin area where the drug was applied. If contact with children is unavoidable, wear a garment with long sleeves that covers the site of application. If direct exposure should occur, wash the child in the area of exposure with soap and water as soon as possible. Solution contained in the spray is flammable; avoid fire, flame, or smoking until spray has dried. If needed, sunscreen should be applied ~1 hour prior to application of Evamist.
Transdermal patch: General administration instructions (also refer to product labeling): Apply patch immediately after removing from protective pouch to lower abdomen or buttocks. Apply to clean, dry, healthy skin that is free of oil, powder, or lotion. Avoid waistline or other areas where tight clothing may rub the patch off; do not apply to breasts. After application, hold patch in place using palm of hand for 10 seconds. Rotate application sites allowing a 1-week interval between applications at a particular site. In general, if patch falls off, the same patch may be reapplied or a new system may be used for the remainder of the dosing interval. When replacing patch, reapply to a new site. Remove patch slowly after use to avoid skin irritation. If any adhesive remains on the skin after removal, first allow skin to dry for 15 minutes, then gently rub area with an oil-based cream or lotion. Dispose of any used or unused patches by folding adhesive ends together, replace in pouch or sealed container, and discard properly in trash away from children and pets.
Climara, Menostar: Swimming, bathing, or wearing patch while in a sauna have not been studied
Vaginal ring: Exact positioning is not critical for efficacy; however, patient should not feel anything once inserted. In case of discomfort, ring should be pushed further into vagina. If ring is expelled prior to 90 days, it may be rinsed off with warm water and reinserted. Ensure proper vaginal placement of the ring to avoid inadvertent urinary bladder insertion. If vaginal infection develops, Femring may remain in place during local treatment of a vaginal infection.
Ensure adequate calcium and vitamin D intake when used for the prevention of osteoporosis.
Store all products at controlled room temperature. In addition:
Depo-Estradiol: Protect from light.
Evamist: Do not freeze.
Femring: Store in pouch.
Transdermal patch (all products): Store in protective pouch.
Climara, Menostar: Do not store >30°C (>86°F).
Ajmaline: Estrogen Derivatives may enhance the adverse/toxic effect of Ajmaline. Specifically, the risk for cholestasis may be increased. Monitor therapy
Amodiaquine: CYP2C8 Inhibitors may increase the serum concentration of Amodiaquine. Avoid combination
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. Monitor therapy
C1 inhibitors: Estrogen Derivatives may enhance the thrombogenic effect of C1 inhibitors. Monitor therapy
Cannabis: May decrease the serum concentration of CYP1A2 Substrates. 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. Monitor therapy
Corticosteroids (Systemic): Estrogen Derivatives may increase the serum concentration of Corticosteroids (Systemic). Monitor therapy
CYP1A2 Inducers (Strong): May increase the metabolism of CYP1A2 Substrates. Management: Consider an alternative for one of the interacting drugs. Some combinations may be specifically contraindicated. Consult appropriate manufacturer labeling. Consider therapy modification
CYP3A4 Inducers (Moderate): May decrease the serum concentration of CYP3A4 Substrates. Monitor therapy
CYP3A4 Inducers (Strong): May increase the metabolism of CYP3A4 Substrates. Management: Consider an alternative for one of the interacting drugs. Some combinations may be specifically contraindicated. Consult appropriate manufacturer labeling. Consider therapy modification
Cyproterone: May decrease the serum concentration of CYP1A2 Substrates. Monitor therapy
Dabrafenib: May decrease the serum concentration of CYP3A4 Substrates. 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. Monitor therapy
Dehydroepiandrosterone: May enhance the adverse/toxic effect of Estrogen Derivatives. Avoid combination
Enzalutamide: May decrease the serum concentration of CYP3A4 Substrates. 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
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
Lenalidomide: Estrogen Derivatives may enhance the thrombogenic effect of Lenalidomide. Monitor therapy
Mitotane: May decrease the serum concentration of CYP3A4 Substrates. 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
NSAID (COX-2 Inhibitor): May enhance the thrombogenic effect of Estrogen Derivatives. NSAID (COX-2 Inhibitor) 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
P-glycoprotein/ABCB1 Inhibitors: May increase the serum concentration of P-glycoprotein/ABCB1 Substrates. P-glycoprotein inhibitors may also enhance the distribution of p-glycoprotein substrates to specific cells/tissues/organs where p-glycoprotein is present in large amounts (e.g., brain, T-lymphocytes, testes, etc.). Monitor therapy
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
Ranolazine: May increase the serum concentration of P-glycoprotein/ABCB1 Substrates. Monitor therapy
ROPINIRole: Estrogen Derivatives may increase the serum concentration of ROPINIRole. Monitor therapy
Sarilumab: May decrease the serum concentration of CYP3A4 Substrates. Monitor therapy
Siltuximab: May decrease the serum concentration of CYP3A4 Substrates. 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
St John's Wort: May decrease the serum concentration of CYP3A4 Substrates. Management: Consider an alternative for one of the interacting drugs. Some combinations may be specifically contraindicated. Consult appropriate manufacturer labeling. Consider therapy modification
Succinylcholine: Estrogen Derivatives may increase the serum concentration of Succinylcholine. Monitor therapy
Teriflunomide: May decrease the serum concentration of CYP1A2 Substrates. Monitor therapy
Thalidomide: Estrogen Derivatives may enhance the thrombogenic effect of Thalidomide. Monitor therapy
Theophylline Derivatives: Estrogen Derivatives 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. Monitor therapy
Ursodiol: Estrogen Derivatives may diminish the therapeutic effect of Ursodiol. Monitor therapy
Reduced response to metyrapone test.
Frequency not defined. Some adverse reactions observed with estrogen and/or progestin combination therapy.
Cardiovascular: Edema (10% to 13%), hypertension (3% to 7%), cerebrovascular accident, deep vein thrombosis, local thrombophlebitis, myocardial infarction, pulmonary thromboembolism, retinal thrombosis, thrombophlebitis, venous thromboembolism
Central nervous system: Headache (9% to 50%), pain (6% to 13%), depression (1% to 11%), anxiety (4% to 10%), dizziness (≤8%), migraine (7%), nipple pain (1% to 7%), hypoesthesia (3%), chorea, dementia, exacerbation of epilepsy, irritability, mood disorder, nervousness
Dermatologic: Skin rash (7% to 9%), pruritus (4% to 7%), chloasma, erythema multiforme, erythema nodosum, localized erythema (transdermal patch), loss of scalp hair, skin discoloration (melasma), urticaria
Endocrine & metabolic: Weight gain (4% to 9%), hot flash (6%), hirsutism (≤5%), change in libido, change in menstrual flow (alterations in frequency and flow of bleeding patterns), exacerbation of diabetes mellitus, exacerbation of porphyria, fibrocystic breast changes, fluid retention, galactorrhea, hypocalcemia, increased serum triglycerides, weight loss
Gastrointestinal: Abdominal pain (6% to 16%), dyspepsia (3% to 9%), constipation (4% to 7%), flatulence (3% to 7%), nausea (3% to 7%), gastroenteritis (3% to 4%), diarrhea (3%), abdominal cramps, bloating, carbohydrate intolerance, gallbladder disease, pancreatitis, vomiting
Genitourinary: Mastalgia (5% to 35%), vaginal hemorrhage (33%), breast tenderness (3% to 17%), endometrium disease (15%), breakthrough bleeding (6% to 11%), leukorrhea (2% to 11%), abnormal uterine bleeding (4% to 10%), breast hypertrophy (7%), dysmenorrhea (7%), cervical polyp (6%), vulvovaginal candidiasis (6%), urinary tract infection (4% to 6%), change in cervical ectropion, change in cervical secretions, endometrial hyperplasia, nipple discharge, spotting, uterine fibroids (size increased), uterine pain, vaginal discomfort (vaginal ring; burning, irritation, itching), vaginitis
Hematologic & oncologic: Hemorrhagic eruption, hypercoagulability state, malignant neoplasm of breast, ovarian cancer
Hepatic: Cholestatic jaundice, exacerbation of hepatic hemangioma
Hypersensitivity: Hypersensitivity reaction (4% to 5%), anaphylactoid reaction, anaphylaxis, angioedema
Infection: Infection (3% to 12%), fungal infection (3% to 10%)
Local: Application site reaction (gel, spray, transdermal patch ≤1%)
Neuromuscular & skeletal: Arthralgia (4% to 12%), back pain (3% to 11%), weakness (8%), limb pain (7% to 8%), myalgia (5% to 6%), neck pain (3% to 6%), arthropathy (4% to 5%), exacerbation of systemic lupus erythematosus, leg cramps
Ophthalmic: Conjunctivitis (3%), change in corneal curvature (steepening), contact lens intolerance
Otic: Otitis media (3%)
Respiratory: Nasopharyngitis (4% to 20%), upper respiratory tract infection (6% to 17%), flu-like symptoms (8% to 13%), sinusitis (4% to 13%), sinus headache (9% to 11%), bronchitis (6% to 8%), sinus congestion (7%), pharyngitis (2% to 7%), rhinitis (2% to 6%), cough (3% to 4%), asthma (3%), exacerbation of asthma
Miscellaneous: Accidental injury (7% to 14%), cyst (7%)
<1% (Limited to important or life-threatening): Bowel obstruction (vaginal ring), genitourinary complaint (inadvertent ring insertion into the bladder should be considered with unexplained urinary complaints), hemorrhage, mechanical complication of genitourinary device (ring adherence to vaginal or bladder wall), portal vein thrombosis, toxic shock syndrome (vaginal ring), unstable angina pectoris
Concerns related to adverse effects:
• Anaphylaxis: Anaphylaxis requiring emergency medical management has been reported and may develop at any time during 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). This risk may be associated with duration of use and declines once combined therapy is discontinued (Chlebowski 2009). The risk of invasive breast cancer was decreased in postmenopausal women with a hysterectomy using CE only, regardless of weight. However, the risk was not significantly decreased in women at high risk for breast cancer (family history of breast cancer, personal history of benign breast disease) (Anderson 2012). An increase in abnormal mammogram findings has also 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.
• 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.
• 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 is dose and duration dependent; risk appears to be 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 (NAMS 2012; NAMS 2013).
• 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.
• Inherited thrombophilia: Women with inherited thrombophilias (eg, protein C or S deficiency) may have increased risk of venous thromboembolism (DeSancho 2010; van Vlijmen 2011). Use is contraindicated in women with protein C, protein S, antithrombin deficiency, or other known thrombophilic disorders.
• 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: Postmenopausal estrogens with or without progestins may increase the risk of ovarian cancer; however, the absolute risk to an individual woman is small. Although results from various studies are not consistent, risk does not appear to be significantly associated with the duration, route, or dose of therapy. In one study, the risk decreased after 2 years following discontinuation of therapy (Mørch 2009). Although the risk of ovarian cancer is rare, women who are at an increased risk (eg, family history) should be counseled about the association (NAMS 2012).
• 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.
• Asthma: Use caution with asthma; may exacerbate disease.
• Carbohydrate intolerance: May have adverse effects on glucose tolerance; use caution in women with diabetes.
• 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 if adverse cardiovascular events occur or are suspected. Use is contraindicated in women with active DVT, PE, active arterial thromboembolic disease or a history of these conditions.
• Diseases exacerbated by fluid retention: Use caution 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 caution with hepatic hemangiomas; may exacerbate disease.
• Hereditary angioedema: Exogenous estrogens may exacerbate angioedema symptoms in women with hereditary angioedema.
• Hypoparathyroidism: Use caution with hypoparathyroidism; estrogen-induced hypocalcemia may occur.
• Migraine: Use caution with migraine; may exacerbate disease.
• Porphyria: Use caution with porphyria; may exacerbate disease.
• SLE: Use caution 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.
• Pediatric: Prior to puberty, estrogens may cause premature closure of the epiphyses. Premature breast development, vaginal bleeding, and vaginal cornification may be induced in girls. Modification of the normal puberty process may occur in boys.
• 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.
• Chlorobutanol: Some products may contain chlorobutanol (a chloral derivative) as a preservative, which may be habit forming.
• Tartrazine: Some products may contain tartrazine.
• Topical emulsion, gel: Absorption of the topical emulsion (Estrasorb) and topical gel (Elestrin) is increased by application of sunscreen; do not apply sunscreen within close proximity of estradiol. Application of sunscreen or lotion after EstroGel decreases absorption of estradiol; the effect of applying sunscreen or lotion prior to Estrogel has not been studied. Application of Divigel with sunscreen has not been evaluated.
• Topical spray: When sunscreen is applied ~1 hour prior to the topical spray (Evamist), no change in absorption was observed (estradiol absorption was decreased when sunscreen is applied 1 hour after Evamist).
• Transdermal patch: May contain conducting metal (eg, aluminum); remove patch prior to MRI.
• Vaginal ring: Use may not be appropriate in women with narrow vagina, vaginal stenosis, vaginal infections, cervical prolapse, rectoceles, cystoceles, or other conditions which may increase the risk of vaginal irritation, ulceration, or increase the risk of expulsion. Ring should be removed in case of ulceration, erosion, or adherence to vaginal wall; do not reinsert until healing is complete. Ensure proper vaginal placement of the ring to avoid inadvertent urinary bladder insertion.
• 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 influence these changes. In addition, personal risk factors (eg, cardiovascular disease, smoking, diabetes, age) also contribute to adverse events; use of specific products may be contraindicated in women with certain risk factors.
• Osteoporosis use: For use only in women at significant risk of osteoporosis and for who other nonestrogen medications are not considered appropriate.
• Risks vs benefits: [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. Women who are early in menopause, who are in good cardiovascular health, and who are at low risk for adverse cardiovascular events can be considered candidates for estrogen with or without progestin therapy for the relief of menopausal symptoms (ACOG 565 2013). Use of a transdermal product should be considered over an oral agent in women requiring systemic therapy who have risk factors for venous thromboembolism or coronary heart disease (ACOG 556 2013; Schenck-Gustafsson 2011; Tremollieres 2011).
• Secondary exposure: Estradiol may be transferred to another person following skin-to-skin contact with the application site. [US Boxed Warning]: Breast budding and breast masses in prepubertal females and gynecomastia and breast masses in prepubertal males have been reported following unintentional contact with application sites of women using topical estradiol (Evamist). Patients should strictly adhere to instructions for use in order to prevent secondary exposure. In most cases, conditions resolved with removal of estradiol exposure. If unexpected changes in sexual development occur in prepubertal children, the possibility of unintentional estradiol exposure should be evaluated by a health care provider. Discontinue if conditions for the safe use of the topical spray cannot be met.
• Vulvar and vaginal atrophy use: Moderate-to-severe symptoms of vulvar and vaginal atrophy include vaginal dryness, dyspareunia, and atrophic vaginitis. When used solely for the treatment of vulvar and vaginal atrophy, topical vaginal products should be considered. Use caution applying topical products to severely atrophic vaginal mucosa. Use of a progestin is normally not required when low-dose estrogen is applied locally and only for this purpose (NAMS 2012; NAMS 2013).
Routine physical examination that includes blood pressure and Papanicolaou smear, breast exam, mammogram. Monitor for signs of endometrial cancer in female patients with a uterus. Adequate diagnostic measures, including endometrial sampling, if indicated, should be performed to rule out malignancy in all cases of undiagnosed abnormal genital bleeding. Monitor for loss of vision, sudden onset of proptosis, diplopia, migraine; signs and symptoms of thromboembolic disorders; glycemic control in patients with diabetes; lipid profiles in patients being treated for hyperlipidemias; thyroid function in patients on thyroid hormone replacement therapy.
Menostar: When used in a woman with a uterus, endometrial sampling is recommended at yearly intervals or when clinically indicated.
Menopausal symptoms, vulvar and vaginal atrophy: Assess need for therapy at 3- to 6-month intervals
Prevention of osteoporosis: Bone density measurement
Note: Monitoring of FSH and serum estradiol is not useful when managing vasomotor symptoms associated with menopause or vulvar and vaginal atrophy.
Pregnancy Risk Factor
In general, the use of estrogen and progestin as in combination hormonal contraceptives has not been associated with teratogenic effects when inadvertently taken early in pregnancy. These products are contraindicated for use during pregnancy.
• Discuss specific use of drug and side effects with patient as it relates to treatment. (HCAHPS: During this hospital stay, were you given any medicine that you had not taken before? Before giving you any new medicine, how often did hospital staff tell you what the medicine was for? How often did hospital staff describe possible side effects in a way you could understand?)
• Patient may experience hair loss, cramps, bloating, enlarged breasts, painful periods, or injection site irritation. Have patient report immediately to prescriber signs of liver problems (dark urine, fatigue, lack of appetite, nausea, abdominal pain, light-colored stools, vomiting, or jaundice), signs of severe cerebrovascular disease (change in strength on one side is greater than the other, difficulty speaking or thinking, change in balance, or vision changes), signs of DVT (edema, warmth, numbness, change in color, or pain in the extremities), angina, shortness of breath, coughing up blood, severe headache, severe dizziness, passing out, severe nausea, vomiting, severe abdominal pain, back pain, bulging eyes, contact lens discomfort, blindness, vision changes, lump in breast, breast soreness or pain, nipple discharge, vaginitis, abnormal vaginal bleeding, depression, mood changes, memory impairment, urinary retention, change in amount of urine passed, painful urination, edema, severe skin irritation, or signs of toxic shock syndrome (diarrhea, dizziness, passing out, severe muscle pain, nausea, vomiting, or sunburn like rash) (HCAHPS).
• Educate patient about signs of a significant reaction (eg, 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. Patient should consult prescriber for additional questions.
Intended Use and Disclaimer: Should not be printed and given to patients. This information is intended to serve as a concise initial reference for health care professionals to use when discussing medications with a patient. You must ultimately rely on your own discretion, experience, and judgment in diagnosing, treating, and advising patients.
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