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Activella

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Activella

Activella®
(estradiol/norethindrone acetate) Tablets

 

Activella

WARNING

CARDIOVASCULAR DISORDERS, BREAST CANCER, ENDOMETRIAL CANCER AND PROBABLE DEMENTIA

Estrogen Plus Progestin Therapy

Cardiovascular Disorders and Probable Dementia

Estrogen plus progestin therapy should not be used for the prevention of cardiovascular disease or dementia [see WARNINGS AND PRECAUTIONS, and Clinical Studies].

The Women's Health Initiative (WHI) estrogen plus progestin substudy reported increased risks of deep vein thrombosis (DVT), pulmonary embolism (PE), stroke and myocardial infarction (MI) in postmenopausal women (50 to 79 years of age) during 5.6 years of treatment with daily oral conjugated estrogen (CE) [0.625 mg] combined with medroxyprogesterone acetate (MPA) [2.5 mg], relative to placebo [see WARNINGS AND PRECAUTIONS, and Clinical Studies ].

The WHI Memory Study (WHIMS) estrogen plus progestin ancillary study of the WHI reported an increased risk of developing probable dementia in postmenopausal women 65 years of age or older during 4 years of treatment with daily CE (0.625 mg) combined with MPA (2.5 mg), relative to placebo. It is unknown whether this finding applies to younger postmenopausal women [see WARNINGS AND PRECAUTIONS, Use in Specific Populations, and Clinical Studies].

Breast Cancer

The WHI estrogen plus progestin substudy also demonstrated an increased risk of invasive breast cancer [see WARNINGS AND PRECAUTIONS, and Clinical Studies].

In the absence of comparable data, these risks should be assumed to be similar for other doses of CE and MPA and other combinations and dosage forms of estrogens and progestins.

Estrogens with or without progestins should be prescribed at the lowest effective doses and for the shortest duration consistent with treatment goals and risks for the individual woman.

Estrogen-Alone Therapy

Endometrial Cancer There is an increased risk of endometrial cancer in a woman with a uterus who uses unopposed estrogens. Adding a progestin to estrogen therapy has been shown to reduce the risk of endometrial hyperplasia, which may be a precursor to endometrial cancer. Adequate diagnostic measures, including directed or random endometrial sampling when indicated, should be undertaken to rule out malignancy in postmenopausal women with undiagnosed persistent or recurring abnormal genital bleeding [see WARNINGS AND PRECAUTIONS].

Cardiovascular Disorders and Probable Dementia

Estrogen-alone therapy should not be used for the prevention of cardiovascular disease or dementia [see WARNINGS AND PRECAUTIONS, and Clinical Studies].

The WHI estrogen-alone substudy reported increased risks of stroke and DVT in postmenopausal women (50 to 79 years of age) during 7.1 years of treatment with daily oral CE (0.625 mg)-alone, relative to placebo [see WARNINGS AND PRECAUTIONS, and Clinical Studies].

The WHIMS estrogen-alone ancillary study of the WHI reported an increased risk of developing probable dementia in postmenopausal women 65 years of age or older during 5.2 years of treatment with daily CE (0.625 mg)-alone, relative to placebo. It is unknown whether this finding applies to younger postmenopausal women [see WARNINGS AND PRECAUTIONS, Use in Specific Populations, and Clinical Studies].

In the absence of comparable data, these risks should be assumed to be similar for other doses of CE and other dosage forms of estrogens.

Estrogens with or without progestins should be prescribed at the lowest effective doses and for the shortest duration consistent with treatment

DRUG DESCRIPTION

Activella 1 mg/0.5 mg is a single tablet for oral administration containing 1 mg of estradiol and 0.5 mg of norethindrone acetate and the following excipients: lactose monohydrate, starch (corn), copovidone, talc, magnesium stearate, hypromellose and triacetin.

Activella 0.5 mg/0.1 mg is a single tablet for oral administration containing 0.5 mg of estradiol and 0.1 mg of norethindrone acetate and the following excipients: lactose monohydrate, starch (corn), hydroxypropylcellulose, talc, magnesium stearate, hypromellose and triacetin.

Estradiol (E2), an estrogen, is a white or almost white crystalline powder. Its chemical name is estra-1, 3, 5 (10)-triene-3, 17β-diol hemihydrate with the empirical formula of C18H24O2, ½ H2O and a molecular weight of 281.4. The structural formula of E2 is as follows:

Estradiol

Activella® (estradiol/norethindrone acetate)  Structural Formula Illustration

Norethindrone acetate (NETA), a progestin, is a white or yellowish-white crystalline powder. Its chemical name is 17β -acetoxy-19-nor-17α -pregn-4-en-20-yn-3-one with the empirical formula of C22H28O3 and molecular weight of 340.5. The structural formula of NETA is as follows:

Norethindrone Acetate

Activella® (estradiol/norethindrone acetate)  Structural Formula Illustration

What are the possible side effects of estradiol and norethindrone (Activella)?

If you experience any of the following serious side effects, stop taking estradiol and norethindrone and seek emergency medical attention or notify your doctor immediately:

  • an allergic reaction (difficulty breathing; closing of the throat; swelling of the lips, tongue, or face; or hives);
  • shortness of breath or pain in the chest;
  • a painful, red, swollen leg;
  • abnormal vaginal bleeding;
  • pain, swelling, or tenderness in the abdomen;
  • severe headache or vomiting, dizziness, faintness or changes in vision or...

Read All Potential Side Effects and See Pictures of Activella »

What are the precautions when taking estradiol, norethindrone acetate (Activella)?

Before taking this medication, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.

Before using this medication, tell your doctor or pharmacist your medical history, especially of: vaginal bleeding of unknown cause, certain cancers (such as breast cancer, cancer of the uterus/ovaries), blood clots, stroke, heart disease (such as heart attack), liver disease, kidney disease, family medical history (especially breast lumps, cancer, blood clots, angioedema), blood clotting disorders (such as protein C or protein S deficiency), high blood pressure, diabetes, high blood cholesterol/triglyceride levels,...

Read All Potential Precautions of Activella »

Last reviewed on RxList: 11/4/2013
This monograph has been modified to include the generic and brand name in many instances.

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Activella - User Reviews

Activella User Reviews

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Report Problems to the Food and Drug Administration

 

You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.


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