Evamist

Patient Information

EVAMIST
(EE-vuh-mist)
(estradiol transdermal spray)

Read this Patient Information before you start using EVAMIST and each time you get a refill. There may be new information. This information does not take the place of talking to your healthcare provider about your menopausal symptoms or your treatment.

What is EVAMIST?

EVAMIST is a prescription medicine spray that contains estradiol (an estrogen hormone).

What is EVAMIST used for?

EVAMIST spray is used after menopause to:

Estrogens are hormones made by a woman’s ovaries. The ovaries normally stop making estrogens when a woman is between 45 and 55 years old. This drop in body estrogen levels causes the “change of life” or menopause (the end of monthly menstrual periods). Sometimes, both ovaries are removed during an operation before natural menopause takes place. The sudden drop in estrogen levels causes “surgical menopause.”

When the estrogen levels begin dropping, some women get very uncomfortable symptoms, such as feelings of warmth in the face, neck, and chest, or sudden strong feelings of heat and sweating (“hot flashes” or “hot flushes”). In some women, the symptoms are mild, and they will not need to use estrogens. In other women, symptoms can be more severe. You and your healthcare provider should talk regularly about whether you still need treatment with EVAMIST.

• Reduce moderate to severe hot flashes

Who should not use EVAMIST?

Do not start using EVAMIST if you:

Vaginal bleeding after menopause may be a warning sign of cancer of the uterus (womb). Your healthcare provider should check any unusual vaginal bleeding to find out the cause.

Estrogens may increase the chance of getting certain types of cancers, including cancer of the breast or uterus. If you have or have had cancer, talk with your healthcare provider about whether you should use EVAMIST.

• have unusual vaginal bleeding
• currently have or have had certain cancers
• had a stroke or heart attack
• currently have or have had blood clots
• currently have or have had liver problems
• have been diagnosed with a bleeding disorder
• are allergic to EVAMIST or any of its ingredients

See the list of ingredients in EVAMIST at the end of this leaflet

EVAMIST is not for pregnant women. If you think you may be pregnant, you should have a pregnancy test and know the results. Do not use EVAMIST if the test is positive and talk to your healthcare provider.

• think you may be pregnant

What should I tell my healthcare provider before I use EVAMIST?

Before you use EVAMIST, tell your healthcare provider if you:

Vaginal bleeding after menopause may be a warning sign of cancer of the uterus (womb). Your healthcare provider should check any vaginal bleeding to find out the cause.

Your healthcare provider may need to check you more carefully if you have certain conditions, such as asthma (wheezing), epilepsy (seizures), diabetes, migraine, endometriosis, lupus, angioedema (swelling of face and tongue), or problems with your heart, liver, thyroid, kidneys, or have high calcium levels in your blood.

Your healthcare provider will let you know if you need to stop using EVAMIST.

The hormone in EVAMIST can pass into your breast milk.

• have any unusual vaginal bleeding
• have any other medical conditions
• are going to have surgery or will be on bed rest
• are breast feeding

Tell your healthcare provider about all the medicines you take including prescription and nonprescription medicines, vitamins and herbal supplements. Some medicines may affect how EVAMIST works. EVAMIST may also affect how your other medicines work. Keep a list of your medicines and show it to your healthcare provider and pharmacist when you get a new medicine.

How should I use EVAMIST?

For detailed instructions, see the step-by-step instructions for using EVAMIST at the end of this Patient Information.

• • Use EVAMIST exactly as your healthcare provider tells you to use it.
  • EVAMIST is for skin use only.
  • Apply EVAMIST at the same time each day.
  • If you use sunscreen 1 hour after you use EVAMIST, it may reduce the amount of EVAMIST absorbed by your skin.
  • The estrogen in EVAMIST spray can transfer from the area of skin where it was sprayed to other people or pets. Do not allow other people, especially children to come into contact with the area of your skin where you have sprayed EVAMIST.
  • If another person accidentally touches the area of your skin where you have sprayed EVAMIST, that area of their skin should be washed with soap and water right away.
  • Do not let pets lick or touch your arm where you have sprayed EVAMIST, especially small pets. EVAMIST may harm them. Cover your skin with clothing where you have sprayed EVAMIST if you think a pet could come in contact with that area of your skin.
  • If a pet accidentally comes in contact with the area of your skin where you have sprayed EVAMIST, the area of the pet’s skin should be washed with soap and water right away.
  • Young children who are accidentally exposed to estrogen through contact with women using EVAMIST may show signs and symptoms of puberty that are not expected. Signs and symptoms in children of exposure to EVAMIST may include:
    • breast budding or breast lumps
    • other signs of abnormal sexual development

    If a child shows signs and symptoms of accidental exposure to EVAMIST:

    • • have the child checked right away by their healthcare provider.
      • stop using EVAMIST and call your healthcare provider right away.
      • talk to your healthcare provider about the correct use of EVAMIST when around children.

• Talk to your healthcare provider about other treatments for your menopause symptoms if accidental exposure to EVAMIST cannot be avoided.
• You and your healthcare provider should talk regularly (for example, every 3 to 6 months) about the dose you are taking and whether you still need treatment with EVAMIST.

What should I avoid while using EVAMIST?

• Do not allow others to make contact with the area of skin where you have applied the EVAMIST spray.
• EVAMIST contains alcohol, which is flammable. Avoid fire, flame, or smoking until the area of your skin where you have applied EVAMIST has dried.

What are the possible side effects of EVAMIST?

Side effects are grouped by how serious they are and how often they happen when you are treated.

Serious, but less common side effects include:

• heart attack
• stroke
• blood clots
• dementia
• breast cancer
• cancer of the lining of the uterus (womb)
• cancer of the ovary
• high blood pressure
• high blood sugar
• gallbladder disease
• liver problems
• changes in your thyroid hormone levels
• enlargement of benign tumors of the uterus (“fibroids”)

Call your healthcare provider right away if you get any of the following warning signs or any other unusual symptoms that concern you:

• new breast lumps
• unusual vaginal bleeding
• changes in vision or speech
• sudden new severe headaches
• severe pains in your chest or legs with or without shortness of breath, weakness and fatigue

Less serious, but common side effects include:

• headache
• breast pain
• irregular vaginal bleeding or spotting
• stomach or abdominal cramps, bloating
• nausea and vomiting
• hair loss
• fluid retention
• vaginal yeast infection

These are not all the possible side effects of EVAMIST. For more information, ask your healthcare provider or pharmacist. Tell your healthcare provider if you have any side effect that bothers you or does not go away. You may report side effects to Perrigo at 1-866-634-9120 or to FDA at 1-800-FDA-1088.

What can I do to lower my chances of a serious side effect with EVAMIST?

• Talk with your healthcare provider regularly about whether you should continue using EVAMIST.
• If you have a uterus, talk with your healthcare provider about whether the addition of a progestin is right for you.
• The addition of a progestin is generally recommended for women with a uterus to reduce the chance of getting cancer of the uterus.
• See your healthcare provider right away if you get vaginal bleeding while using EVAMIST.
• Have a pelvic exam, breast exam, and mammogram (breast X-ray) every year unless your healthcare provider tells you something else.
• If members of your family have had breast cancer or if you have ever had breast lumps or an abnormal mammogram, you may need to have breast exams more often.
• If you have high blood pressure, high cholesterol (fat in the blood), diabetes, are overweight, or if you use tobacco, you may have a higher chance of getting heart disease.

Ask your healthcare provider for ways to lower your chances of getting heart disease.

How should I store EVAMIST?

• Store EVAMIST at room temperature 68°F to 77°F (20°C to 25°C)
• Do not freeze.
• Safely throw away medicine that is out of date or no longer needed.

Keep EVAMIST and all medicines out of the reach of children.

General information about the safe and effective use of EVAMIST.

Medicines are sometimes prescribed for conditions other than those listed in patient information leaflets. Do not use EVAMIST for conditions for which it was not prescribed. Do not give EVAMIST to other people, even if they have the same symptoms you have. It may harm them.

This leaflet summarizes the most important information about EVAMIST. If you would like more information, talk with your healthcare provider or pharmacist. You can ask for information about EVAMIST that is written for health professionals.

For more information, go to www.Evamist.com or call Perrigo at 1-866-634-9120.

What are the ingredients in EVAMIST?

Active ingredient: estradiol

Inactive ingredients: octisalate, alcohol

INSTRUCTIONS FOR USE

EVAMIST
(EE-vuh-mist)
(estradiol transdermal spray)

Read this Instructions for Use before you start using EVAMIST and each time you get a refill. There may be new information. This information does not take the place of talking to your healthcare provider about your menopausal symptoms of your treatment.

The parts of your EVAMIST applicator

EVAMIST comes in a spray applicator that delivers a measured amount of estradiol to your skin with each spray (see Figure A).

 

 

Step 1. Priming your EVAMIST

Hold the EVAMIST applicator upright. Keep the cover on. Fully press down the pump button 3 times with your thumb or index finger (see Figure B). After priming, the EVAMIST applicator is ready to use.

• Before you use your EVAMIST applicator for the first time, the applicator must be primed.
• The EVAMIST applicator should be primed only 1 time when you first start using a new applicator. Do not prime the EVAMIST applicator before your dose each day.

 

 

Step 2. Using your EVAMIST

• Remove the plastic cover.
• Apply EVAMIST to a clean, dry, unbroken skin area on the inside of your forearm between the elbow and the wrist (see Figure C). This area must be clean, dry, and the skin must be without open wounds, cuts, abrasions, or rashes.
• Hold the EVAMIST applicator upright and rest the plastic cone flat against your skin. You may need to change the position of your arm or the position of the cone on your arm so that the cone is flat against your skin and there are no gaps between the cone and your skin (see Figure C).
• Press the pump button down fully 1 time (see Figure C).

 

 

If your healthcare provider tells you to increase your dose to 2 or 3 sprays, move the cone before applying the second or third spray to an area of your skin next to but not touching the area of the previous spray (see Figure D).

 

 

• Do not apply EVAMIST to your breasts or in and around your vagina.
• Do not massage or rub EVAMIST into your skin.
• Let EVAMIST spray dry on your skin for at least:
  • 2 minutes before you cover your skin with clothing.
  • 1 hour before you wash your skin.

Step 3. After you use EVAMIST

• Place the plastic cover back on the EVAMIST applicator cone.
• EVAMIST is flammable until dry. Avoid fire, flame, or smoking until the area of your skin where you have applied EVAMIST has completely dried.

Step 4. Throwing away used EVAMIST applicators

• Your EVAMIST applicator contains enough medicine to allow for initial priming of the pump with 3 sprays and application of 56 sprays.
• Do not use your EVAMIST applicator for more than 56 application sprays even though the bottle may not be completely empty. You may not get the correct dose.
• Always replace the cover over the cone of your EVAMIST applicator before you throw it away to prevent accidental exposure to other people or pets.

This Patient Information and Instructions for Use have been approved by the U.S. Food and Drug Administration.

Description

Evamist (estradiol transdermal spray) is designed to deliver estradiol to the blood circulation following topical application to the skin of a rapidly drying solution from a metered-dose pump.

Evamist is a homogeneous solution of 1.7% estradiol USP (active ingredient) in alcohol USP and octisalate USP formulated to provide sustained release of the active ingredient into the systemic circulation.

Estradiol USP is a white crystalline powder, chemically described as estra-1,3,5(10)-triene-3,17β-diol. It has an empirical formula of C₁₈H₂₄O₂• ½H₂O and molecular weight of 281.4. The structural formula is:

 

 

Each metered-dose pump contains 8.1 mL and is designed to deliver 56 sprays of 90 mcL each after priming. One spray of Evamist contains 1.53 mg estradiol. The metered-dose pump should be held upright and vertical for spraying. Before a new applicator is used for the first time, the pump should be primed by spraying 3 times into the cover.

One, two or three sprays are applied daily each morning to adjacent non-overlapping 20 cm² areas on the inner surface of the arm between the elbow and the wrist and allowed to dry.

Treatment Of Moderate To Severe Vasomotor Symptoms Due To Menopause.

Dosage And Administration

Generally, when estrogen is prescribed for a postmenopausal woman with a uterus, a progestin should also be considered to reduce the risk of endometrial cancer. A woman without a uterus does not need a progestin. In some cases, however, hysterectomized women with a history of endometriosis may need a progestin [see WARNINGS AND PRECAUTIONS].

Use of estrogen-alone, or in combination with a progestin, should be with the lowest effective dose and for the shortest duration consistent with treatment goals and risks for the individual woman. Postmenopausal women should be re-evaluated periodically as clinically appropriate to determine if treatment is still necessary.

Treatment Of Moderate To Severe Vasomotor Symptoms Due To Menopause

Evamist therapy should be initiated with one spray per day. Dosage adjustment should be guided by the clinical response.

Before applying the first dose from a new applicator, the pump should be primed by spraying 3 sprays with the cover on. The container should be held upright and vertical for spraying.

One, two or three sprays are applied each morning to adjacent, non-overlapping areas on the inner surface of the forearm, starting near the elbow. Sprays should be allowed to dry for approximately 2 minutes before covering the site with clothing. The site should not be washed for at least one hour. Application of Evamist to other skin surfaces has not been adequately studied. Evamist should not be applied to skin surfaces other than the forearm.

Strict adherence to the following precautions is advised in order to minimize the potential for secondary exposure to estradiol from Evamist-treated skin. Women should cover the Evamist application site with clothing if another person may come into contact with that area of skin after the spray dries. Additional precautions to minimize unintentional secondary exposure are outlined in Patient Counseling Information [see PATIENT INFORMATION] and in the Patient Information Leaflet at the end of the prescribing information.

How Supplied

Dosage Forms And Strengths

Evamist is an estradiol transdermal spray. One spray consists of 90 mcL that contains 1.53 mg of estradiol.

Evamist (NDC 0574-2067-27) is supplied as a homogeneous solution of estradiol USP, octisalate USP and alcohol USP. The liquid formulation of Evamist is packaged in a glass vial fitted with a metered-dose pump. The unit is encased in a plastic housing with a conical bell opening that controls the distance, angle, and area of application of the metered-dose spray. Each metered-dose pump contains 8.1 mL and is designed to deliver 56 sprays of 90 mcL after priming. One spray contains 1.53 mg estradiol.

Storage And Handling

Keep out of reach of children.

Alcohol and alcohol-based liquids are flammable. Avoid fire, flame or smoking until the spray has dried.

Store at room temperature 20°C to 25°C (68°F to 77°F); excursion permitted between 15°C to 30°C (59°F to 86°F). Do not freeze.

Manufactured by: DPT Laboratories. Ltd, San Antonio, TX 78215. Revised: Aug 2021

The following serious adverse reactions are discussed elsewhere in the labeling:

• Cardiovascular Disorders [see BOX WARNING, WARNINGS AND PRECAUTIONS]
• Malignant Neoplasms [see BOX WARNING, WARNINGS AND PRECAUTIONS]

Clinical Trials Experience

Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in clinical practice.

In a 12-week, randomized, placebo-controlled trial of Evamist in 454 women, 80 to 90 percent of women randomized to active drug received at least 70 days of therapy and 75 to 85 percent randomized to placebo received at least 70 days of therapy.

The adverse reactions that occurred in at least 5 percent of women in any treatment group are shown in Table 1.

Table 1. Frequency of Adverse Reactions (≥5%) in Any Treatment Group in a Controlled Study of Evamist

System Organ Class Preferred Term	Frequency n (%)
	1 Spray		2 Spray		3 Sprays
	Placebo (N = 77)	Evamist (N = 76)	Placebo (N = 76)	Evamist (N = 74)	Placebo (N = 75)	Evamist (N = 76)
Reproductive System and Breast Disorders
Breast tenderness	0 (0)	4 (5)	4 (5)	5 (7)	0 (0)	4 (5)
Nipple pain	0 (0)	2 (3)	0 (0)	5 (7)	0 (0)	1 (1)
Gastrointestinal Disorders
Nausea	5 (7)	1 (1)	1 (1)	2 (3)	4 (5)	2 (3)
Infections and Infestations
Nasopharyngitis	1 (1)	4 (5)	2 (3)	3 (4)	1 (1)	1 (1)
Musculoskeletal and Connective Tissue Disorders
Back pain	1 (1)	2 (3)	2 (3)	4 (5)	1 (1)	2 (3)
Arthralgia	1 (1)	1 (1)	4 (5)	1 (1)	0 (0)	3 (4)
Nervous system
Headache	4 (5)	7 (9)	5 (7)	9 (12)	7 (9)	8 (11)

 

Application site reactions were reported in 3 out of 226 (1.3%) women treated with Evamist.

Postmarketing Experience

The following adverse reactions have been identified during post-approval use of Evamist. Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure.

Breasts: Breast swelling, breast mass, breast enlargement

Cardiovascular: Heart rate increased

Central nervous system: Dizziness, dysgeusia, paresthesia, lethargy, hypoesthesia

Eyes: Eye irritation, ocular hyperemia

Gastrointestinal: Abdominal pain, diarrhea, constipation, abdominal distension, dry mouth, decreased appetite

Genitourinary system: Vaginal bleeding

Musculoskeletal: Muscle spasms, arthritis

Psychiatric: Insomnia, mood swings, anxiety, irritability, mood altered, depression

Respiratory tract: Cough, dyspnea, dry throat

Skin: Nipple and areola discoloration, usually on the same side of the body as the inner forearm on which Evamist is applied, rash, pruritus, alopecia, urticaria, dry skin, skin discoloration, chloasma

Miscellaneous: Weight increased, malaise, fatigue, asthenia

Drug Interactions

No drug interaction studies have been conducted for Evamist.

Metabolic Interactions

In vitro and in vivo studies have shown that estrogens are metabolized partially by cytochrome P450 3A4 (CYP3A4). Therefore, inducers or inhibitors of CYP3A4 may affect estrogen drug metabolism. Inducers of CYP3A4 such as St. John’s wort (Hypericum perforatum) preparations, phenobarbital, carbamazepine, and rifampin may reduce plasma concentrations of estrogens, possibly resulting in a decrease in therapeutic effects and/or changes in the uterine bleeding profile. Inhibitors of CYP3A4 such as erythromycin, clarithromycin, ketoconazole, itraconazole, ritonavir and grapefruit juice may increase plasma concentrations of estrogens and may result in side effects.

Included as part of the PRECAUTIONS section.

Precautions

Cardiovascular Disorders

An increased risk of stroke and deep vein thrombosis (DVT) has been reported with estrogen alone therapy. An increased risk of stroke, DVT, pulmonary embolism, and myocardial infarction has been reported with estrogen plus progestin therapy. Should any of these occur or be suspected, estrogens with or without progestins should be discontinued immediately.

Risk factors for arterial vascular disease (for example, hypertension, diabetes mellitus, tobacco use, hypercholesterolemia, and obesity) and/or venous thromboembolism (for example, personal history or family history of venous thromboembolism [VTE], obesity, and systemic lupus erythematosus) should be managed appropriately.

Stroke

In the Women’s Health Initiative (WHI) estrogen alone substudy, a statistically significant increased risk of stroke was reported in women receiving daily conjugated estrogens (CE 0.625 mg) compared to placebo (45 versus 33 per 10,000 women-years). The increase in risk was demonstrated in year 1 and persisted¹ [see Clinical Studies].

In the estrogen plus progestin substudy of WHI, a statistically significant increased risk of stroke was reported in women receiving daily CE 0.625 mg plus medroxyprogesterone acetate (MPA 2.5 mg) compared to placebo (31 versus 24 per 10,000 women-years). The increase in risk was demonstrated after the first year and persisted [see Clinical Studies].

Coronary heart disease

In the estrogen alone substudy of WHI, no overall effect on coronary heart disease (CHD) events (defined as non-fatal myocardial infarction [MI], silent MI, or CHD death) was reported in women receiving estrogen alone compared to placebo² [see Clinical Studies].

In the estrogen plus progestin substudy of the WHI, no statistically significant increase of CHD events was reported in women receiving CE/MPA compared to women receiving placebo (39 versus 33 per 10,000 women-years). An increase in relative risk was demonstrated in year 1, and a trend toward decreasing relative risk was reported in years 2 through 5 [see Clinical Studies].

In postmenopausal women with documented heart disease (n = 2,763, average age 66.7 years), in a controlled clinical trial of secondary prevention of cardiovascular disease (Heart and Estrogen/Progestin Replacement Study [HERS]), treatment with daily CE 0.625 mg/MPA 2.5 mg demonstrated no cardiovascular benefit. During an average follow-up of 4.1 years, treatment with CE/MPA did not reduce the overall rate of CHD events in postmenopausal women with established coronary heart disease. There were more CHD events in the CE/MPA-treated group than in the placebo group in year 1, but not during the subsequent years. Two thousand, three hundred and twenty-one (2,321) women from the original HERS trial agreed to participate in an open label extension of HERS, HERS II. Average follow-up in HERS II was an additional 2.7 years, for a total of 6.8 years overall. Rates of CHD events were comparable among women in the CE/MPA group and the placebo group in HERS, HERS II, and overall.

Venous Thromboembolism (VTE)

In the estrogen alone substudy of WHI, the risk of VTE (DVT and pulmonary embolism [PE]) was reported to be increased for women receiving daily CE compared to placebo (30 versus 22 per 10,000 women-years), although only the increased risk of DVT reached statistical significance (23 versus 15 per 10,000 women-years). The increase in VTE risk was demonstrated during the first two years³ [see Clinical Studies].

In the estrogen plus progestin substudy of WHI, a statistically significant twofold greater rate of VTE was reported in women receiving daily CE/MPA compared to women receiving placebo (35 versus 17 per 10,000 women-years). Statistically significant increases in risk for both DVT (26 versus 13 per 10,000 women-years) and PE (18 versus 8 per 10,000 women-years) were also demonstrated. The increase in VTE risk was observed during the first year and persisted [see Clinical Studies].

If feasible, estrogens should be discontinued at least 4 to 6 weeks before surgery of the type associated with an increased risk of thromboembolism, or during periods of prolonged immobilization.

Malignant Neoplasms

Endometrial Cancer

An increased risk of endometrial cancer has been reported with the use of unopposed estrogen therapy in women with a uterus. The reported endometrial cancer risk among unopposed estrogen users is about 2 to 12 times greater than in nonusers, and appears dependent on duration of treatment and on estrogen dose. Most studies show no significant increased risk associated with use of estrogens for less than 1 year. The greatest risk appears associated with prolonged use, with an increased risk of 15- to 24-fold for 5 to 10 years or more. This risk has been shown to persist for at least 8 to 15 years after estrogen therapy is discontinued.

Clinical surveillance of all women using estrogen plus progestin therapy is important. Adequate diagnostic measures, including endometrial sampling when indicated, should be undertaken to rule out malignancy in all cases of undiagnosed persistent or recurring abnormal vaginal bleeding. There is no evidence that the use of natural estrogens results in a different endometrial risk profile than synthetic estrogens of equivalent estrogen dose. Adding a progestin to estrogen therapy has been shown to reduce the risk of endometrial hyperplasia, which may be a precursor to endometrial cancer.

Breast Cancer

The most important randomized clinical trial providing information about this issue in estrogen alone users is the Women’s Health Initiative (WHI) substudy of daily conjugated estrogens (CE 0.625 mg). In the estrogen alone substudy of WHI, after an average of 7.1 years of follow-up, daily CE 0.625 mg was not associated with an increased risk of invasive breast cancer (relative risk [RR] 0.80, 95 percent nominal confidence interval [nCI] 0.62-1.04) [see Clinical Studies].

The most important randomized clinical trial providing information about this issue in estrogen plus progestin users is the Women’s Health Initiative (WHI) substudy of daily CE 0.625 mg plus medroxyprogesterone acetate (MPA 2.5 mg). In the estrogen plus progestin substudy, after a mean follow-up of 5.6 years, the WHI substudy reported an increased risk of breast cancer in women who took daily CE/MPA. In this substudy, prior use of estrogen alone or estrogen plus progestin therapy was reported by 26 percent of the women. The relative risk of invasive breast cancer was 1.24 (95 percent nCI 1.01-1.54), and the absolute risk was 41 versus 33 cases per 10,000 women-years, for estrogen plus progestin compared with placebo, respectively. Among women who reported prior use of hormone therapy, the relative risk of invasive breast cancer was 1.86, and the absolute risk was 46 versus 25 cases per 10,000 women-years, for estrogen plus progestin compared with placebo. Among women who reported no prior use of hormone therapy, the relative risk of invasive breast cancer was 1.09, and the absolute risk was 40 versus 36 cases per 10,000 women-years for estrogen plus progestin compared with placebo. In the same substudy, invasive breast cancers were larger and diagnosed at a more advanced stage in the CE/MPA group compared with the placebo group. Metastatic disease was rare, with no apparent difference between the two groups. Other prognostic factors, such as histologic subtype, grade and hormone receptor status did not differ between the groups [see Clinical Studies].

Observational studies have also reported an increased risk of breast cancer for estrogen plus progestin therapy, and a smaller increased risk for estrogen alone therapy, after several years of use. The risk increased with duration of use, and appeared to return to baseline over about 5 years after stopping treatment (only the observational studies have substantial data on risk after stopping). Observational studies also suggest that the risk of breast cancer was greater, and became apparent earlier, with estrogen plus progestin therapy as compared to estrogen alone therapy. However, these studies have not found significant variation in the risk of breast cancer among different estrogens or among different estrogen plus progestin combinations, doses, or routes of administration.

The use of estrogen alone and estrogen plus progestin has been reported to result in an increase in abnormal mammograms requiring further evaluation.

All women should receive yearly breast examinations by a healthcare provider and perform monthly breast self-examinations. In addition, mammography examinations should be scheduled based on patient age, risk factors, and prior mammogram results.

Ovarian Cancer

The estrogen plus progestin substudy of the WHI reported that daily CE/MPA increased the risk of ovarian cancer. After an average follow-up of 5.6 years, the relative risk for ovarian cancer for CE/MPA versus placebo was 1.58 (95 percent nCI, 0.77-3.24) but was not statistically significant. The absolute risk for CE/MPA vs. placebo was 4.2 versus 2.7 cases per 10,000 women-years. In some epidemiologic studies, the use of estrogen-only products, in particular for 10 or more years, has been associated with an increased risk of ovarian cancer. Other epidemiologic studies have not found these associations.

Dementia

In the estrogen alone Women’s Health Initiative Memory Study (WHIMS), a substudy of the WHI, a population of 2,947 hysterectomized women 65 to 79 years of age was randomized to daily conjugated estrogens (CE 0.625 mg) or placebo. In the estrogen plus progestin WHIMS substudy, a population of 4,532 postmenopausal women 65 to 79 years of age was randomized to daily CE 0.625 mg plus medroxyprogesterone acetate (MPA 2.5 mg) or placebo.

In the estrogen alone substudy, after an average follow-up of 5.2 years, 28 women in the CE alone group and 19 women in the placebo group were diagnosed with probable dementia. The relative risk of probable dementia for CE alone versus placebo was 1.49 (95 percent CI, 0.83-2.66). The absolute risk of probable dementia for CE alone versus placebo was 37 versus 25 cases per 10,000 women-years [see Use In Specific Populations and Clinical Studies].

In the estrogen plus progestin substudy, after an average follow-up of 4 years, 40 women in the CE/MPA group and 21 women in the placebo group were diagnosed with probable dementia. The relative risk of probable dementia for CE/MPA versus placebo was 2.05 (95 percent CI, 1.21-3.48). The absolute risk of probable dementia for CE/MPA versus placebo was 45 versus 22 cases per 10,000 women-years [see Use In Specific Populations and Clinical Studies].

When data from the two populations were pooled as planned in the WHIMS protocol, the reported overall relative risk for probable dementia was 1.76 (95 percent CI, 1.19-2.60). Since both substudies were conducted in women 65 to 79 years of age, it is unknown whether these findings apply to younger postmenopausal women [see Use In Specific Populations and Clinical Studies].

Unintentional Secondary Exposure to Estrogen

Postmarketing reports of breast budding and breast masses in prepubertal females and gynecomastia and breast masses in prepubertal males following unintentional secondary exposure to Evamist have been reported. In most cases, the condition resolved with removal of Evamist exposure.

Unexpected changes in breast tissue or other signs of abnormal sexual development in prepubertal children as well as the possibility of unintentional secondary exposure to Evamist should be brought to the attention of a physician. The physician should identify the cause of abnormal sexual development in the child. If unexpected breast development or changes are determined to be the result of unintentional exposure to Evamist, the physician should counsel the woman on the appropriate use and handling of Evamist when around children. Women should cover the Evamist application site with clothing if another person may come into contact with the site. Consideration should be given to discontinuing Evamist if conditions for safe use cannot be met [see PATIENT INFORMATION].

Gallbladder Disease

A two- to four-fold increase in the risk of gallbladder disease requiring surgery in postmenopausal women receiving estrogens has been reported.

Hypercalcemia

Estrogen administration may lead to severe hypercalcemia in women with breast cancer and bone metastases. If hypercalcemia occurs, use of the drug should be stopped and appropriate measures taken to reduce the serum calcium level.

Visual Abnormalities

Retinal vascular thrombosis has been reported in women receiving estrogens. Discontinue medication pending examination if there is sudden partial or complete loss of vision, or a sudden onset of proptosis, diplopia, or migraine. If examination reveals papilledema or retinal vascular lesions, estrogens should be permanently discontinued.

Addition of a Progestin When a Woman Has Not Had a Hysterectomy

Studies of the addition of a progestin for 10 or more days of a cycle of estrogen administration, or daily with estrogen in a continuous regimen, have reported a lowered incidence of endometrial hyperplasia than would be induced by estrogen treatment alone. Endometrial hyperplasia may be a precursor to endometrial cancer.

There are, however, possible risks that may be associated with the use of progestins with estrogens compared to estrogen alone regimens. These include a possible increased risk of breast cancer, adverse effects on lipoprotein metabolism (lowering HDL, raising LDL), and impairment of glucose tolerance.

Elevated Blood Pressure

In a small number of case reports, substantial increases in blood pressure have been attributed to idiosyncratic reactions to estrogens. In a large, randomized, placebo-controlled clinical trial, a generalized effect of estrogens on blood pressure was not seen. Blood pressure should be monitored at regular intervals with estrogen use.

Hypertriglyceridemia

In women with preexisting hypertriglyceridemia, estrogen therapy may be associated with elevations of plasma triglycerides leading to pancreatitis and other complications. Consider discontinuation of treatment if pancreatitis or other complications develop.

Impaired Liver Function and Past History of Cholestatic Jaundice

Estrogens may be poorly metabolized in women with impaired liver function. For women with a history of cholestatic jaundice associated with past estrogen use or with pregnancy, caution should be exercised, and in the case of recurrence, medication should be discontinued.

Hypothyroidism

Estrogen administration leads to increased thyroid-binding globulin (TBG) levels. Women with normal thyroid function can compensate for the increased TBG by making more thyroid hormone, thus maintaining free T4 and T3 serum concentrations in the normal range. Women dependent on thyroid hormone replacement therapy who are also receiving estrogens may require increased doses of their thyroid hormone replacement therapy. These women should have their thyroid function monitored in order to maintain their free thyroid hormone levels in an acceptable range.

Fluid Retention

Estrogens may cause some degree of fluid retention. Women who have conditions that might be influenced by this factor, such as a cardiac or renal dysfunction, warrant careful observation when estrogens are prescribed.

Hypocalcemia

Estrogens should be used with caution in women with preexisting severe hypocalcemia.

Exacerbation of Endometriosis

Endometriosis may be exacerbated with administration of estrogens. A few cases of malignant transformation of residual endometrial implants have been reported in women treated post-hysterectomy with estrogen alone therapy. For women known to have residual endometriosis post-hysterectomy, the addition of progestin should be considered.

Exacerbation of Other Conditions

Estrogens may cause an exacerbation of asthma, diabetes mellitus, epilepsy, migraine, porphyria, systemic lupus erythematosus and hepatic hemangiomas and should be used with caution in women with these conditions.

Alcohol-Based Products are Flammable

Avoid fire, flame or smoking until the spray has dried.

Application of Sunscreen

When sunscreen is applied approximately one hour after application of Evamist, estradiol absorption was decreased by 11 percent. When sunscreen is applied approximately one hour before the application of Evamist, no significant change in estradiol absorption was observed.

Laboratory Tests

Serum follicle stimulating hormone and estradiol levels have not been shown to be useful in the management of moderate to severe vasomotor symptoms.

Drug and Laboratory Test Interactions

Accelerated prothrombin time, partial thromboplastin time, and platelet aggregation time; increased platelet count; increased factors II, VII antigen, VIII antigen, VIII coagulant activity, IX, X, XII, VII-X complex, II-VII-X complex, and beta- thromboglobulin; decreased levels of antifactor Xa and antithrombin III, decreased antithrombin III activity; increased levels of fibrinogen and fibrinogen activity; increased plasminogen antigen and activity.

Increased TBG levels leading to increased circulating total thyroid hormone levels, as measured by protein-bound iodine (PBI), T4 levels (by column or by radioimmunoassay) or T3 levels by radioimmunoassay. T3 resin uptake is decreased, reflecting the elevated TBG. Free T4 and free T3 concentrations are unaltered. Women on thyroid hormone replacement therapy may require higher doses of thyroid hormone.

Other binding proteins may be elevated in serum (corticosteroid binding globulin [CBG], SHBG), leading to increased total circulating corticosteroids and sex steroids, respectively. Free hormone concentrations, such as testosterone and estradiol, may be decreased. As with other transdermal estradiol products, a slight increase in SHBG was seen with Evamist active drug compared with baseline.

Increased plasma HDL and HDL2 cholesterol subfraction concentrations, reduced LDL cholesterol concentration, increased triglyceride levels.

Impaired glucose tolerance.

Patient Counseling Information

Vaginal Bleeding

Inform women of the importance of reporting vaginal bleeding to their healthcare provider as soon as possible.

Unintentional Secondary Exposure to Evamist

Provide the following information about secondary exposure to Evamist:

• Apply Evamist as directed and keep children from contacting exposed application site(s). If direct contact with the application site occurs, the contact area should be washed thoroughly with soap and water. Women should cover the Evamist application site, after the two minute drying period, with clothing if another person may come in contact with that area of skin. [See FDA-Approved PATIENT INFORMATION Leaflet.]
• Look for signs of unexpected sexual development, such as breast mass or increased breast size in prepubertal children.
• If signs of unintentional secondary exposure are noticed:
  • Have children evaluated by a healthcare provider.
  • Discontinue Evamist until the cause(s) is identified for any unexpected sexual development in children under their care.
  • Women should contact their healthcare provider and discuss the appropriate use and handling of Evamist when around children.
  • If conditions for safe use cannot be met, Evamist should be discontinued and alternative treatments for menopausal signs and symptoms should be considered.
• Pets may also be unintentionally exposed to Evamist if above precautions are not followed.

Common Adverse Reactions with Estrogen

Inform women of the possible side effects of estrogen therapy such as headache, breast pain and tenderness, nausea and vomiting.

Nonclinical Toxicology

Carcinogenesis, Mutagenesis, Impairment of Fertility

Long-term continuous administration of natural and synthetic estrogens in certain animal species increases the frequency of carcinomas of the breast, uterus, cervix, vagina, testis and liver.

Use In Specific Populations

Pregnancy

Evamist should not be used during pregnancy [see CONTRAINDICATIONS]. There appears to be little or no increased risk of birth defects in children born to women who have used estrogens and progestins as an oral contraceptive inadvertently during early pregnancy.

Nursing Mothers

Evamist should not be used during lactation. Estrogen administration to nursing mothers has been shown to decrease the quantity and quality of the milk. Detectable amounts of estrogens have been identified in the milk of mothers receiving this drug.

Pediatric Use

Evamist is not intended for pediatric use and no clinical data have been collected in children.

Geriatric Use

There have not been sufficient numbers of geriatric women involved in studies utilizing Evamist to determine whether those over 65 years of age differ from younger subjects in their response to Evamist.

In the estrogen alone substudy of the Women’s Health Initiative (WHI) study, 46 percent (n = 4,943) of women were 65 years of age and older, while 7.1 percent (n = 767) of women were 75 years of age and older. There was a higher relative risk (daily conjugated estrogens [CE 0.625 mg] versus placebo) of stroke in women less than 75 years of age compared to women 75 years of age and older.

In the estrogen alone substudy of the Women’s Health Initiative Memory Study (WHIMS), a substudy of WHI, a population of 2,947 hysterectomized women, 65 to 79 years of age, was randomized to receive daily conjugated estrogens (CE 0.625 mg) or placebo. After an average follow-up of 5.2 years, the relative risk (CE versus placebo) of probable dementia was 1.49 (95 percent CI, 0.83-2.66). The absolute risk of developing probable dementia with estrogen alone was 37 versus 25 cases per 10,000 women-years compared to placebo.

Of the total number of women in the estrogen plus progestin substudy of WHI, 44 percent (n = 7,320) were 65 years of age and older, while 6.6 percent (n = 1,095) were 75 years of age and older. In women 75 years of age and older compared to women less than 75 years of age, there was a higher relative risk of non-fatal stroke and invasive breast cancer in the estrogen plus progestin group versus placebo. In women greater than 75 years of age, the increased risk of non-fatal stroke and invasive breast cancer observed in the estrogen plus progestin group compared to placebo was 75 versus 24 per 10,000 women-years and 52 versus 12 per 10,000 women-years, respectively.

In the estrogen plus progestin WHIMS substudy, a population of 4,532 postmenopausal women, 65 to 79 years of age, was randomized to receive daily CE 0.625 mg/MPA 2.5 mg or placebo. In the estrogen plus progestin group, after an average follow-up of 4 years, the relative risk (CE/MPA versus placebo) of probable dementia was 2.05 (95 percent CI, 1.21-3.48). The absolute risk of developing probable dementia with CE/MPA was 45 versus 22 cases per 10,000 women-years compared to placebo.

Seventy-nine (79) percent of the cases of probable dementia occurred in women that were older than 70 for the CE alone group, and 82 percent of the cases of probable dementia occurred in women who were older than 70 in the CE/MPA group. The most common classification of probable dementia in both the treatment groups and placebo groups was Alzheimer’s disease.

When data from the two populations were pooled as planned in the WHIMS protocol, the reported overall relative risk for probable dementia was 1.76 (95 percent CI, 1.19-2.60). Since both substudies were conducted in women 65 to 79 years of age, it is unknown whether these findings apply to younger postmenopausal women [see WARNINGS AND PRECAUTIONS].

REFERENCES

1. Hendrix, SL, et al. Effects of conjugated equine estrogen on stroke in the Women’s Health Initiative. Circulation. 2006;113:2425-2434.

2. Hsia J, et al. Conjugated equine estrogens and coronary heart disease. Arch Int Med. 2006;166:357–365.

3. Curb JD, et al. Venous thrombosis and conjugated equine estrogen in women without a uterus. Arch Int Med. 2006;166:772-780.

Overdosage of estrogen may cause nausea and vomiting, breast tenderness, abdominal pain, drowsiness and fatigue, and withdrawal bleeding may occur in women. Treatment of overdose consists of discontinuation of Evamist together with institution of appropriate symptomatic care.

Contraindications

Evamist is contraindicated in women with any of the following conditions:

• Undiagnosed abnormal genital bleeding
• Known, suspected, or history of cancer of the breast
• Known or suspected estrogen-dependent neoplasia
• Active DVT, PE, or history of these conditions
• Active arterial thromboembolic disease (for example, stroke and MI), or history of these conditions
• Known anaphylactic reaction or angioedema with Evamist
• Known liver impairment or disease
• Known protein C, protein S, or antithrombin deficiency, or other known thrombophilic disorders
• Known or suspected pregnancy

Mechanism Of Action

Endogenous estrogens are largely responsible for the development and maintenance of the female reproductive system and secondary sexual characteristics. Although circulating estrogens exist in a dynamic equilibrium of metabolic interconversions, estradiol is the principal intracellular human estrogen and is substantially more potent than its metabolites, estrone and estriol, at the receptor level.

The primary source of estrogen in normally cycling adult women is the ovarian follicle, which secretes 70 to 500 mcg of estradiol daily, depending on the phase of the menstrual cycle. After menopause, most endogenous estrogen is produced by conversion of androstenedione, secreted by the adrenal cortex, to estrone in the peripheral tissues. Thus, estrone and the sulfate conjugated form, estrone sulfate, are the most abundant circulating estrogens in postmenopausal women.

Estrogens act through binding to nuclear receptors in estrogen-responsive tissues. To date, two estrogen receptors have been identified. These vary in proportion from tissue to tissue.

Circulating estrogens modulate the pituitary secretion of the gonadotropins, luteinizing hormone (LH) and FSH, through a negative feed back mechanism. Estrogens act to reduce the elevated levels of these hormones seen in postmenopausal women.

Pharmacodynamics

There are no pharmacodynamic data for Evamist.

Pharmacokinetics

Absorption

In a multiple-dose study, 72 postmenopausal women were treated for 14 days with Evamist to the inner forearm. Serum concentrations of estradiol appeared to reach steady state after 7 to 8 days of application of one, two, or three 90 mcL sprays of Evamist per day (Figure 1).

Figure 1. Mean (±SD) Serum Estradiol Concentrations on Day 14 Following Topical Application for 14 Days of One, Two or Three Sprays of Evamist (Unadjusted for Baseline)

 

Pharmacokinetics parameters for estradiol from one, two, or three 90 mcL sprays of Evamist, as assessed on Day 14 of this study, are described in Table 2.

Table 2. Estradiol Pharmacokinetic Parameters on Day 14 (Unadjusted for Baseline)

PK Parameter	Number of Daily Sprays of Evamist
	1 Spray (N = 24)	2 Sprays (N = 23)	3 Sprays (N = 24)
Cmax(pg/mL)a	36.4 (62)	57.4 (94)	54.1 (50)
Cmin(pg/mL)a	11.3 (52)	18.1 (51)	19.6 (27)
Cavg (pg/mL)a	19.6 (49)	30.7 (43)	30.9 (30)
AUC0-24(pg*hr/mL)a	471 (49)	736 (43)	742 (30)
Tmax (hours)b	20 (0-24)	18 (0-24)	20 (0-24)
a Values expressed are arithmetic means (%CV) b Values expressed are medians (minimum-maximum)

 

Distribution

The distribution of exogenous estrogens is similar to that of endogenous estrogens. Estrogens are widely distributed in the body and are generally found in higher concentrations in the sex hormone target organs. Estrogens circulate in blood largely bound to SHBG and albumin.

Metabolism

Exogenous estrogens are metabolized in the same manner as endogenous estrogens. Circulating estrogens exist in a dynamic equilibrium of metabolic interconversions. These transformations take place mainly in the liver. Estradiol is converted reversibly to estrone, and both can be converted to estriol, which is a major urinary metabolite. Estrogens also undergo enterohepatic recirculation via sulfate and glucuronide conjugation in the liver, biliary secretion of conjugates into the intestine, and hydrolysis in the intestine followed by reabsorption. In postmenopausal women, a significant proportion of the circulating estrogens exist as sulfate conjugates, especially estrone sulfate, which serves as a circulating reservoir for the formation of more active estrogens.

Excretion

Estradiol, estrone and estriol are excreted in the urine along with glucuronide and sulfate conjugates.

Use In Specific Populations

No pharmacokinetic studies were conducted with Evamist in specific populations, including women with renal or hepatic impairment.

Potential For Estradiol Transfer

The effect of estradiol transfer was evaluated in 20 healthy postmenopausal women who applied three 90-mcL sprays of Evamist to the inner forearm once daily. One hour after applying Evamist, subjects held the dosed forearm against the inner forearm of a non-dosed (recipient) male subject for one 5-minute period of continual contact. A 4% increase in serum estradiol exposure was observed in persons who came in contact with the application site. The possibility of unintentional secondary exposure to Evamist should be brought to the attention of physicians and Evamist users.

Effect Of Application Site Washing

Site washing with warm water and soap one hour after the application of three 90 mcL sprays to the inner forearm did not have a significant effect on average 24-hour serum concentrations of estradiol.

Clinical Studies

Effects On Vasomotor Symptoms

In a 12-week, randomized, double-blind, placebo-controlled clinical trial, a total of 454 postmenopausal women (average 53 years of age, 70 percent Caucasian and 24 percent African-American) were randomized and received at least one dose of Evamist (one, two or three 90 mcL sprays) or placebo. Generally healthy postmenopausal women were enrolled with a mean total frequency of ≥56 moderate to severe vasomotor symptoms per week (≥8 per day).

Efficacy was determined as a statistically significant and clinically significant (at least two per day or 14 per week difference) reduction in hot flush frequency and a statistically significant reduction in severity for Evamist versus placebo. One, two or three daily sprays of Evamist were shown to be better than placebo for relief of frequency (Table 3) and severity (Table 4) of moderate to severe vasomotor symptoms at Week 4 and Week 12.

Table 3. Effect of Treatment on the Daily Frequency of Moderate to Severe Vasomotor Symptoms at Week 4 and Week 12 (Intent-To-Treat Population, LOCF)

Treatment (N)	Mean Change from Baselinea (SD)
	Baseline Mean (SD)	Week 4 Mean (SD)	Week 12 Mean (SD)
1 Spray
Evamist (N=76)	11.81 (4.07)	-6.26 (4.01)	-8.10 (4.02)
Placebo (N=77)	12.41 (5.59)	-3.64 (5.30)	-4.76 (5.84)
Differenceb	–	-2.62	-3.34
p-valuec	–	0.0010	0.0004
2 Sprays
Evamist (N=74)	12.66 (7.33)	-7.30 (6.93)	-8.66 (6.65)
Placebo (N=76)	12.13 (6.10)	-4.74 (4.38)	-6.19 (5.77)
Differenceb	–	-2.56	-2.47
p-valuec	–	0.0027	0.0099
3 Sprays
Evamist (N=76)	10.78 (3.58)	-6.64 (4.23)	-8.44 (4.50)
Placebo (N=75)	12.55 (11.94)	-4.54 (7.40)	-5.32 (6.30)
Differenceb	–	-2.10	-3.12
p-valuec	–	0.0002	<0.0001
a Mean change and difference based on raw data b Evamist versus placebo c Tests for pairwise differences using ANCOVA

 

Table 4. Effect of Treatment on the Weekly Severity of Moderate to Severe Vasomotor Symptoms at Week 4 and Week 12 (Intent-To-Treat Population, LOCF)^a

Treatment (N)	Mean Change from Baselineb (SD)
	Baseline Mean (SD)	Week 4 Mean (SD)	Week 12 Mean (SD)
1 Spray
Evamist (N=76)	2.53 (0.25)	-0.47 (0.80)	-1.04 (1.01)
Placebo (N=77)	2.55 (0.25)	-0.19 (0.55)	-0.26 (0.60)
Differencec	–	-0.28	-0.78
p-valued	–	0.0573	<0.0001
2 Sprays
Evamist (N=74)	2.54 (0.21)	-0.57 (0.83)	-0.92 (1.01)
Placebo (N=76)	2.54 (0.22)	-0.25 (0.64)	-0.54 (0.89)
Differencec	–	-0.32	-0.38
p-valued	–	0.0160	0.0406
3 Sprays
Evamist (N=76)	2.58 (0.25)	-0.43 (0.66)	-1.07 (1.01)
Placebo (N=75)	2.54 (0.24)	-0.13 (0.53)	-0.31 (0.75)
Differencec	–	-0.30	-0.76
p-valued	–	0.0031	<0.0001
a Severity score calculated as: (2 x number moderate +3 x number severe)/ number moderate + number severe) b Mean change and difference based on raw data c Evamist versus placebo d Tests for pairwise differences using ANCOVA

 

Women’s Health Initiative Studies

The WHI enrolled approximately 27,000 predominantly healthy postmenopausal women in two substudies to assess the risks and benefits of daily oral CE (0.625 mg)- alone or in combination with MPA (2.5 mg) compared to placebo in the prevention of certain chronic diseases. The primary endpoint was the incidence of CHD (defined as nonfatal MI, silent MI and CHD death), with invasive breast cancer as the primary adverse outcome. A “global index” included the earliest occurrence of CHD, invasive breast cancer, stroke, PE, endometrial cancer (only in the CE plus MPA substudy), colorectal cancer, hip fracture, or death due to other cause. These substudies did not evaluate the effects of CE-alone or CE plus MPA on menopausal symptoms.

WHI Estrogen-Alone Substudy

The WHI estrogen-alone substudy was stopped early because an increased risk of stroke was observed, and it was deemed that no further information would be obtained regarding the risks and benefits of estrogen-alone in predetermined primary endpoints. Results of the estrogen-alone substudy, which included 10,739 women (average 63 years of age, range 50 to 79 years of age; 75.3 percent White, 15.1 percent Black, 6.1 percent Hispanic, 3.6 percent Other), after an average follow-up of 7.1 years are presented in Table 5.

Table 5. Relative and Absolute Risk Seen in the Estrogen Alone Substudy of WHI^a

Event	Relative Risk CE vs. Placebo (95%) nCIb)	CE (n = 5,310)	Placebo (n = 5,429)
		Absolute Risk per 10,000 Women-Years
CHD eventsc	0.95 (0.78-1.16)	54	57
Non-fatal MIc	0.91 (0.73-1.14)	40	43
CHD deathc	1.01 (0.71-1.43)	16	16
All strokesc	1.33 (1.05-1.68)	45	33
Ischemic strokec	1.55 (1.19-2.01)	38	25
Deep vein thrombosisc,d	1.47 (1.06-2.06)	23	15
Pulmonary embolismc	1.37 (0.90-2.07)	14	10
Invasive breast cancerc	0.80 (0.62-1.04)	28	34
Colorectal cancere	1.08 (0.75-1.55)	17	16
Hip facturec	0.65 (0.45-0.94)	12	19
Vertebral fracturesc,d	0.64 (0.44-0.93)	11	18
Lower arm/wrist fracturesc,d	0.58 (0.47-0.72)	35	59
Total fracturesc,d	0.71 (0.64-0.80)	144	197
Death due to other causese,f	1.08 (0.88-1.32)	53	50
Overall mortalityc,d	1.04 (0.88-1.22)	79	75
Global indexg	1.02 (0.92-1.13)	206	201
a Adapted from numerous WHI publications. WHI publications can be viewed at www.nhlbi.nih.gov/whi. b Nominal confidence intervals unadjusted for multiple looks and multiple comparisons. c Results are based on centrally adjudicated data for an average follow-up of 7.1 years. d Not included in “global index”. e Results are based on an average follow-up of 6.8 years. f All deaths, except from breast or colorectal cancer, definite or probable CHD, PE or cerebrovascular disease. g A subset of the events was combined in a “global index”, defined as the earliest occurrence of CHD events, invasive breast cancer, stroke, PE, endometrial cancer, colorectal cancer, hip fracture, or death due to other causes.

 

For those outcomes included in the WHI “global index” that reached statistical significance, the absolute excess risk per 10,000 women-years in the group treated with CE-alone was 12 more strokes, while the absolute risk reduction per 10,000 women-years was 7 fewer hip fractures.⁹ The absolute excess risk of events included in the “global index” was a non-significant 5 events per 10,000 women-years. There was no difference between the groups in terms of all-cause mortality.

No overall difference for primary CHD events (nonfatal MI, silent MI and CHD death) and invasive breast cancer incidence in women receiving CE-alone compared to placebo was reported in final centrally adjudicated results from the estrogen-alone substudy, after an average follow-up of 7.1 years.

Centrally adjudicated results for stroke events from the estrogen-alone substudy, after an average follow-up of 7.1 years, reported no significant differences in distribution of stroke subtypes or severity, including fatal strokes, in women receiving CE-alone compared to placebo. Estrogen-alone increased the risk for ischemic stroke, and this excess risk was present in all subgroups of women examined.¹⁰

Timing of the initiation of estrogen-alone therapy relative to the start of menopause may affect the overall risk benefit profile. The WHI estrogen-alone substudy stratified by age showed in women 50 to 59 years of age a non-significant trend toward reduced risk for CHD [hazard ratio (HR) 0.63 (95 percent CI, 0.36-1.09)] and overall mortality [HR 0.71 (95 percent CI, 0.46-1.11)].

WHI Estrogen Plus Progestin Substudy

The WHI estrogen plus progestin substudy was stopped early. According to the predefined stopping rule, after an average follow-up of 5.6 years of treatment, the increased risk of invasive breast cancer and cardiovascular events exceeded the specified benefits included in the “global index”. The absolute excess risk of events included in the “global index” was 19 per 10,000 women-years.

For those outcomes included in the WHI “global index” that reached statistical significance after 5.6 years of follow-up, the absolute excess risks per 10,000 womenyears in the group treated with CE plus MPA were 7 more CHD events, 8 more strokes, 10 more PEs, and 8 more invasive breast cancers, while the absolute risk reduction per 10,000 women-years were 6 fewer colorectal cancers and 5 fewer hip fractures.

Results of the CE plus MPA substudy which included 16,608 women (average 63 years of age; range 50 to 79 years of age: 83.9 percent White, 6.5 percent Black, 5.4 percent Hispanic, 3.9 percent Other) are presented in Table 6. These results reflect centrally adjudicated data after an average follow-up of 5.6 years.

Table 6. Relative and Absolute Risk Seen in the Estrogen Plus Progestin Substudy of WHI at an Average of 5.6 Years^a,b

Event	Relative Risk CE/MPA vs. Placebo (95%) nCIc)	CE/MPA (n = 8,506)	Placebo (n = 8,102)
		Absolute Risk per 10,000 Women-Years
CHD events	1.23 (0.99-1.53)	41	34
Non-fatal MI	1.28 (1.00-1.63)	31	25
CHD deathc	1.10 (0.70-1.75)	8	8
All strokes	1.31 (1.03-1.68)	33	25
Ischemic stroke	1.44 (1.09-1.90)	26	18
Deep vein thrombosis	1.95 (1.43-2.67)	26	13
Pulmonary embolism	2.13 (1.45-3.11)	18	8
Invasive breast cancer	1.24 (1.01-1.54)	41	33
Colorectal cancer	0.61 (0.42-0.87)	10	16
Endometrial cancerd	0.81 (0.48-1.36)	6	7
Cervical cancerd	1.44 (0.47-4.42)	2	1
Hip facture	0.67 (0.47-0.96)	11	16
Vertebral fracturesd	0.65 (0.46-0.92)	11	17
Lower arm/wrist fracturesd	0.71 (0.59-0.85)	44	62
Total fracturesd	0.76 (0.69-0.83)	152	199
Overall mortalityf	1.00 (0.83-1.19)	52	52
Global indexg	1.13 (1.02-1.25)	184	165
a Adapted from numerous WHI publications, WHI publications can be viewed at www.nhlbi.nih.gov/whi b Results are based on centrally adjudicated data. c Nominal confidence intervals unadjusted for multiple looks and multiple comparisons. d Not included in “global index”. e Includes metastatic and non-metastatic breast cancer, with the exception of in situ breast cancer. f All deaths, except from breast or colorectal cancer, definite or probably CHD, PE or cerebrovascular disease. g A subset of the events was combined in a “global index”, defined as the earliest occurrence of CHD events, invasive breast cancer, stroke, PE, endometrial cancer, colorectal cancer, hip fracture, or death due to other causes.

 

Timing of the initiation of estrogen plus progestin therapy relative to the start of menopause may affect the overall risk benefit profile. The WHI estrogen plus progestin substudy stratified by age showed in women 50 to 59 years of age a non-significant trend toward reduced risk for overall mortality [HR 0.69 (95 percent CI, 0.44-1.07)].

Women’s Health Initiative Memory Study

The WHIMS estrogen-alone ancillary study of the WHI, enrolled 2,947 predominantly healthy hysterectomized postmenopausal women 65 to 79 years of age (45 percent were 65 to 69 years of age, 36 percent were 70 to 74 years of age, and 19 percent were 75 years of age and older) to evaluate the effects of daily CE (0.625 mg) on the incidence of probable dementia (primary outcome) compared to placebo.

After an average follow-up of 5.2 years, the relative risk of probable dementia for CE-alone versus placebo was 1.49 (95 percent CI, 0.83-2.66). The absolute risk of probable dementia for CE-alone versus placebo was 37 versus 25 cases per 10,000 women-years. Probable dementia as defined in this study included Alzheimer’s disease (AD), vascular dementia (VaD) and mixed type (having features of both AD and VaD). The most common classification of probable dementia in the treatment group and the placebo group was AD. Since the ancillary study was conducted in women 65 to 79 years of age, it is unknown whether these findings apply to younger postmenopausal women [see WARNINGS AND PRECAUTIONS and Use In Specific Populations].

The WHIMS estrogen plus progestin ancillary study enrolled 4,532 predominantly healthy postmenopausal women 65 years of age and older (47 percent were 65 to 69 years of age, 35 percent were 70 to 74 years of age, and 18 percent were 75 years of age and older) to evaluate the effects of daily CE (0.625 mg) plus MPA (2.5 mg) on the incidence of probable dementia (primary outcome) compared to placebo.

After an average follow-up of 4 years, the relative risk of probable dementia for CE plus MPA versus placebo was 2.05 (95 percent CI, 1.12-3.48). The absolute risk of probable dementia for CE plus MPA versus placebo was 45 versus 22 per 10,000 women-years. Probable dementia as defined in this study included AD, VaD and mixed type (having features of both AD and VaD). The most common classification of probable dementia in the treatment group and the placebo group was AD. Since the ancillary study was conducted in women 65 to 79 years of age, it is unknown whether these findings apply to younger postmenopausal women [see WARNINGS AND PRECAUTIONS, and Use In Specific Populations].

When data from the two populations were pooled as planned in the WHIMS protocol, the reported overall relative risk for probable dementia was 1.76 (95 percent CI, 1.19-2.60). Differences between groups became apparent in the first year of treatment. It is unknown whether these findings apply to younger postmenopausal women [see WARNINGS AND PRECAUTIONS, and Use In Specific Populations].

REFERENCES

9.Jackson RD, et al. Effects of Conjugated Equine Estrogen on Risk of Fractures and BMD in Postmenopausal Women with Hysterectomy: Results from the Women’s Health Initiative Randomized Trial. J Bone Miner Res. 2006:21;817-828.

10.Hendrix SL, et al. Effects of Conjugated Equine Estrogen on Stroke in the Women’s Health Initiative. Circulation. 2006:113;2425-2434.