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Estradiol / Norethindrone Acetate 1 mg; .5 mg Tablet, Film Coated, 28-count — NDC 50090-8003-00 package photo
Label image from the product's FDA listing (DailyMed) — may show a different pack size or an older label revision.

Estradiol / Norethindrone Acetate 1 mg; .5 mg Tablet, Film Coated, 28-count — NDC 50090-8003-0 (Billing 50090-8003-00)

by A-S Medication Solutions · 1 BLISTER PACK in 1 CARTON / 28 TABLET, FILM COATED in 1 BLISTER PACK

This is a package of 28 tablets of Estradiol / Norethindrone Acetate 1 mg; .5 mg Tablet, Film Coated from A-S Medication Solutions, marketed since Apr 2008 and currently FDA-listed. It is this product's only package size.

NDC 50090-8003-00
🏷️ FDA NDC (as labeled) 50090-8003-0 billing pads the package segment with a zero
Rx only Generic On market Non-controlled ⇄ Compare with another NDC
🗂️ FDA directory synced Oct 1, 2026 · this listing last changed Jul 24, 2026 · sources: openFDA · FDA label (DailyMed) · FDA Orange & Purple Book · First Databank · CMS NADAC, ASP, Medicare & Medicaid · RxNorm
📋 All sources & update times →

This page is curated, coded, and maintained by

Compiled from public FDA, CMS, DailyMed, NADAC, and related drug data sources. Editorial policy

Identity & classification

Regulatory identifiers FDA, NLM and CMS codes for this package

FDA NDC (as labeled) 50090-8003-0
Product NDC 50090-8003
11-digit billing NDC 50090800300
NCPDP billing unit EA — each (per item)
RxCUI 1359126, 1359127
UNII 4TI98Z838E, 9S44LIC7OJ
Application # ANDA078324
SPL Set ID e166bdf6-eb60-49b8-9747-2a33c3e3461b
Established class (EPC) Estrogen
Mechanism of action Estrogen Receptor Agonists
Chemical class Estradiol Congeners
DEA schedule Non-controlled
Marketing category ANDA
Marketing status On market
FDA listing status Listed (active directory)
Marketing start 2008-04-17
Route ORAL
Dosage form TABLET, FILM COATED
Substance ESTRADIOL; NORETHINDRONE ACETATE
TE code (Orange Book) AB · RLD · RS
Quick answers
  • RxCUI (RxNorm): 1359126
Why two NDCs? The FDA registers this code as 50090-8003-0 — a 5-4-1 layout, and that's what's printed on the package and shown on DailyMed. For insurance claims, every NDC is standardized to a uniform 11-digit 5-4-2 format by adding a zero to the package segment → 50090-8003-00. Same drug, same package — only the format differs.
Where does this data come from?
Identifiers from the FDA openFDA NDC Directory and Structured Product Labeling; RxCUI from RxNorm (NLM); GPI from Medi-Span; GCN / HIC / AHFS / legend from First Databank.

RxNorm drug class

This medicine belongs to the Radioactive Diagnostic Agent class.

Pharmacologic class Radioactive Diagnostic Agent, Estrogen
Drug family (ATC) Natural and semisynthetic estrogens, plain, Progestogens and estrogens, sequential preparations
How it works Positron Emitting Activity, Estrogen Receptor Agonists
Where does this data come from?
Therapeutic classes from RxNorm RxClass (U.S. National Library of Medicine) — Established Pharmacologic Class (FDA), ATC drug family (WHO) and mechanism of action, matched by this product’s RxCUI.

Clinical

📗 Our plain-language guide HelloPharmacist
  • Great question. The estradiol (the estrogen part) is what actually relieves your hot flashes, night sweats, and vaginal dryness by replacing the estrogen your body stopped making a...
  • What exactly is this medicine doing for me — why do I need both an estrogen and a progestin?
  • Most women notice things like breast tenderness, some spotting or light bleeding, headaches, or nausea — especially in the first few months. Those are common and usually settle dow...
  • What are the most important side effects I should actually watch out for?
📖 Read our full Estradiol / Norethindrone guide →

Supplement & herbal interactions

🌿 Drug–supplement interaction checker →
Where does this data come from?
Plain-language summary from MedlinePlus (U.S. National Library of Medicine); supplement & herbal interactions and nutrient depletion data from the Natural Medicines database; our full guide is HelloPharmacist editorial content.

Pricing

A drug doesn't have one price. Each row is a different public payment system, and none is what you'd pay at the counter — that depends on your insurance. The ⓘ on each row explains what it measures.

Price systemPer eachPer package
Retail pharmacies payNADAC · weekly Not in the retail survey — common for institutional, discontinued, or low-volume packs.
Medicaid paysCMS SDUD · 12 mo No recent Medicaid claims on file for this NDC — rare and low-volume NDCs are suppressed in the public data.
Medicare drug plans payPart D · Q2 2026 $1.20 $33.57 / 28 tablets
Where does this data come from?
NADAC (National Average Drug Acquisition Cost) is the CMS weekly pharmacy-acquisition-cost survey — what pharmacies pay. ASP (Average Sales Price) is the CMS Medicare Part B drug-payment file, published quarterly. Medicaid pays is computed by us from CMS State Drug Utilization Data (total reimbursed ÷ units, trailing 12 months) — gross of rebates and inclusive of dispensing fees, so it reflects what Medicaid paid, not an acquisition cost. Medicare drug plans pay is the median negotiated point-of-sale unit cost across plans listing this NDC in the CMS quarterly Prescription Drug Plan pricing files, before rebates. The VA pays is the federal contract price (FSS, and the statutory Big 4 ceiling where listed) from the VA National Acquisition Center pharmaceutical price file. All are free public government data; each measures a different payer, so the figures are not directly comparable.

Packaging — all sizes for this product

Package NDCDescription Marketing startMarketing endStatus
50090-8003-00 You're viewing this Main listing 1 BLISTER PACK in 1 CARTON / 28 TABLET, FILM COATED in 1 BLISTER PACK 2026-06-25 — Active

Therapeutic equivalents

ProductLabelerPackNADAC/unitTEStatusPrice vs. this
Estradiol and Norethindrone Acetate 1 mg/1; .5 mg 50742-0657-28 Ingenus 28 tablets $0.570 AB Availability likely —
Estradiol / Norethindrone Acetate 1 mg/1; .5 mg 51991-0474-28 Breckenridge 28 tablets $0.570 AB Availability likely —
Abigale 1 mg/1; .5 mg 70700-0330-85 Xiromed 84 tablets $0.570 AB Availability likely —
Mimvey 1 mg/1; .5 mg 00093-5455-28 Teva 28 tablets $0.570 AB Availability likely —
Etyqa 1 mg/1; .5 mg 59651-0424-28 Aurobindo 28 tablets — — FDA listed —
Estradiol / Norethindrone Acetate 1 mg/1; .5 mgthis 50090-8003-00 A-S 28 tablets — AB FDA listed —
About this product: this is a generic version of the medicine. FDA equivalence ratings are shown when available, and other versions are listed above, least expensive first.
Where does this data come from?
Equivalents are other NDCs of the same ingredient, form and route from the openFDA NDC Directory, ranked least-expensive-first by NADAC. Therapeutic-equivalence (AB) ratings come from the FDA Orange Book; biologics use the FDA Purple Book for biosimilar & interchangeable status.

Availability & generic status

🏛️
2008
On the market since
Apr 2008
📍
2026
Currently FDA-listed
18 years listed
🔓
·
Generic on the market
this product is a generic
✅This is a generic drug

This product is an FDA-approved generic. Other versions of the same drug are listed under Therapeutic equivalents, least expensive first.

Where does this data come from?
Patents and exclusivity from the FDA Orange Book (small-molecule drugs), refreshed from public FDA data. Generic launch timing is an estimate, not a guarantee.

What it looks like

Color White
ShapeRound
ImprintB;474
Size6 mm
ScoringNot scored
One label can cover several strengths, so colors may be combined — always confirm a loose pill against the dispensed prescription label or a pharmacist.
Where does this data come from?
Physical description (imprint, shape, color, scoring, coating) from this product’s FDA Structured Product Labeling (SPL), mirrored from DailyMed / openFDA.

Inactive Ingredients / Excipients

Inactive ingredients, also called excipients, are components of the drug product other than the active ingredient. They may include fillers, dyes, coatings, preservatives, flavors, or other formulation ingredients.

💡 Tap an ingredient (hover on desktop) to see what it is and why it’s used.

  • UNII 3NXW29V3WO
    Hypromellose is a plant-based thickener made from cellulose. It's used in medicines as a binder to hold ingredients together, a coating for tablets, and a thickener for liquids.
  • UNII EWQ57Q8I5X
    Lactose monohydrate is a natural sugar derived from milk. It serves as a filler and binder in tablets and capsules, helping create the proper size, texture, and consistency of the medicine.
  • UNII 70097M6I30
    Magnesium stearate is a salt made from magnesium and stearic acid, a fatty substance. It's used in tablets and capsules as a lubricant and glidant to help ingredients flow smoothly during manufacturing and prevent sticking.
  • UNII O8232NY3SJ
    A plant-based carbohydrate derived from corn kernels. It acts as a filler to add bulk, a binder to hold ingredients together, and a disintegrant to help the tablet break apart in your stomach for absorption.
  • UNII 7SEV7J4R1U
    A powder made from a naturally occurring mineral. In medicines, talc works as a glidant and anti-caking agent, helping tablets and capsules flow smoothly during manufacturing and preventing clumping.
  • UNII XHX3C3X673
    Triacetin is a clear, oily liquid made from glycerin and acetic acid. It works as a plasticizer and solvent in medicines, helping soften coatings and improve how liquids mix together in formulations.
  • UNII D9C330MD8B
    Copovidone is a synthetic polymer made by combining two types of plastic-like molecules. It acts as a binder and film-former to help hold tablet ingredients together and improve how the medicine dissolves in your body.

7 inactive ingredients listed in the exact product block matched to this NDC.

Where does this data come from?
Data sourced from official FDA Structured Product Labeling (SPL) via DailyMed — ingredient classCode="IACT" elements from the exact product block matched by this NDC. Label-section narrative from DailyMed / the openFDA label index is shown separately when available.

Inactive ingredient FAQ

Are inactive ingredients the same for every manufacturer?
No. Inactive ingredients can differ by manufacturer, dosage form, strength, and package / product version.
Why might an inactive ingredient be missing?
Some SPLs do not provide a complete structured inactive-ingredient list, and older or unusual labels may only include the information in narrative text.
Can inactive ingredients matter?
Yes. They can matter for allergies, intolerances, dyes, gluten / lactose concerns, preservatives, and formulation differences — but confirm with a pharmacist or the manufacturer when it’s clinically important.

Manufacturer & labeler

LabelerA-S Medication Solutions
Application holderBRECKENRIDGE PHARMACEUTICAL INC
FDA applicationANDA078324 (ANDA)
Labeler code50090
First marketedApr 2008
Product typeHuman Prescription Drug
Portfolio2,811 products on file
The labeler markets the product; the application holder owns the FDA approval. They’re often the same company but can differ (e.g. a repackager or an authorized generic). A mailing address / phone appears here when the manufacturer includes it in the product’s FDA label (not all do).
Where does this data come from?
Labeler, application holder and registered establishment from the FDA openFDA NDC Directory and Drugs@FDA; address/contact from the product’s FDA label.

Full prescribing information FDA SPL

The complete FDA label for this product — the official prescribing information, verbatim, section by section. Very long sections are excerpted here and marked; the full text is on DailyMed (linked in the sources below). Jump with a chip, search within the label, or expand everything.
🚨 Boxed Warning 🎯 Indications and Usage ⏱️ Dosage and Administration 💊 Dosage Forms and Strengths ⛔ Contraindications ⚠️ Warnings and Cautions 🤒 Adverse Reactions 🔄 Drug Interactions 🔄 Drug / Laboratory Test Interactions 👥 Use in Specific Populations 🤰 Pregnancy 🧒 Pediatric Use 🧓 Geriatric Use 🆘 Overdosage 🧬 Clinical Pharmacology 🧬 Mechanism of Action 📦 How Supplied / Storage and Handling 📋 Description 💬 Information for Patients 🧬 Pharmacokinetics 🧬 Pharmacodynamics 🔬 Clinical Studies 🧪 Nonclinical Toxicology 📄 Carcinogenesis, Mutagenesis, Impairment of Fertility 📚 References 📄 Patient Package Insert 📄 Recent Major Changes 📄 Package Label / Principal Display Panel
🚨 Boxed Warning ~3 min read ▾

WARNING: CARDIOVASCULAR DISORDERS, PROBABLE DEMENTIA, BREAST CANCER, and ENDOMETRIAL CANCER WARNING: CARDIOVASCULAR DISORDERS, PROBABLE DEMENTIA, BREAST CANCER, and ENDOMETRIAL CANCER See full prescribing information for complete boxed warning Estrogen Plus Progestin Therapy 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) ( 5.1 ) The WHI estrogen plus progestin substudy reported increased risks of invasive breast cancer ( 5.2 ) The WHI Memory Study (WHIMS) estrogen plus progestin ancillary study of WHI reported an increased risk of probable dementia in postmenopausal women 65 years of age and older ( 5.3 ) Do not use estrogen plus progestogen therapy for the prevention of cardiovascular disease or dementia ( 5.1 , 5.3 ) Estrogen-Alone Therapy There is an increased risk of endometrial cancer in a woman with a uterus who use unopposed estrogens ( 5.2 ) The WHI estrogen-alone substudy reported increased risks of stroke and DVT ( 5.1 ) The WHIMS estrogen-alone ancillary study of WHI reported an increased risk of probable dementia in postmenopausal women 65 years of age and older ( 5.3 ) Do not use estrogen-alone therapy for the prevention of cardiovascular disease or dementia ( 5.2 , 5.3 ) Estrogen Plus Progestin Therapy Cardiovascular Disorders and Probable Dementia 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 (5.1) , and Clinical Studies (14.5) ] .

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 and 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 (5.3) , Use in Specific Populations (8.5) , and Clinical Studies (14.6) ]. Do not use estrogen plus progestogen therapy for the prevention of cardiovascular disease or dementia [see Warnings and Precautions (5.1 , 5.3) , and Clinical Studies (14.5 , 14.6) ] .

Breast Cancer The WHI estrogen plus progestin substudy also demonstrated an increased risk of invasive breast cancer [see Warnings and Precautions (5.2) , and Clinical Studies (14.5) ] . Only daily oral 0.625 mg CE and 2.5 mg MPA were studied in the estrogen plus progestin substudy of the WHI. Therefore, the relevance of the WHI findings regarding adverse cardiovascular events, dementia and breast cancer to lower CE plus other MPA doses, other routes of administration, or other estrogen plus progestogen products is not known.

Without such data, it is not possible to definitively exclude these risks or determine the extent of these risks for other products. Discuss with your patient the benefits and risks of estrogen plus progestogen therapy, taking into account her individual risk profile. Prescribe estrogens with or without progestogens 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 progestogen 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 undiagnose… [Excerpted — this section continues on DailyMed.]

🎯 Indications and Usage 217 words ▾

1 INDICATIONS AND USAGE Estradiol/Norethindrone Acetate Tablets are indicated for: Estradiol/Norethindrone Acetate Tablets are an estrogen and progestin combination indicated in a woman with a uterus for: Treatment of Moderate to Severe Vasomotor Symptoms due to Menopause ( 1.1 ) Treatment of Moderate to Severe Symptoms of Vulvar and Vaginal Atrophy due to Menopause ( 1.2 ) Limitations of Use : When prescribing solely for the treatment of moderate to severe symptoms of vulvar and vaginal atrophy due to menopause, first consider the use of topical vaginal products.

Prevention of Postmenopausal Osteoporosis ( 1.3 ) Limitations of Use : When prescribing solely for the prevention of postmenopausal osteoporosis, first consider the use of non-estrogen medications. Consider estrogen therapy only for women at significant risk of osteoporosis.

1.1 Treatment of Moderate to Severe Vasomotor Symptoms due to Menopause

1.2Treatment of Moderate to Severe Symptoms of Vulvar and Vaginal Atrophy due to Menopause Limitation of Use When prescribing solely for the treatment of moderate to severe symptoms of vulvar and vaginal atrophy due to menopause, first consider the use of topical vaginal products.

1.3Prevention of Postmenopausal Osteoporosis Limitation of Use When prescribing solely for the prevention of postmenopausal osteoporosis, first consider the use of non-estrogen medications. Consider estrogen therapy only for women at significant risk of osteoporosis.

⏱️ Dosage and Administration ~1 min read ▾

2 DOSAGE AND ADMINISTRATION Use estrogen-alone, or in combination with a progestogen, at the lowest effective dose and the shortest duration consistent with treatment goals and risks for the individual woman. Reevaluate postmenopausal women periodically as clinically appropriate to determine whether treatment is still necessary. Take a single Estradiol/Norethindrone Acetate 1 mg/0.5 mg or 0.5 mg/0.1 mg tablet orally once daily for the Treatment of Moderate to severe Vasomotor Symptoms due to Menopause and for the Prevention of Postmenopausal Osteoporosis ( 2.1 , 2.3 ) Estradiol/Norethindrone Acetate 1 mg/0.5 mg tablets are taken orally once daily for the Treatment of Moderate to Severe Symptoms of Vulvar and Vaginal Atrophy due to Menopause ( 2.2 )

2.1Treatment of Moderate to Severe Vasomotor Symptoms due to Menopause Take a single Estradiol/Norethindrone Acetate tablet orally once daily for the treatment of moderate to severe vasomotor symptoms due to menopause. Estradiol/Norethindrone Acetate Tablets 1 mg/0.5 mg Estradiol/Norethindrone Acetate Tablets 0.5 mg/0.1 mg

2.2Treatment of Moderate to Severe Symptoms of Vulvar and Vaginal Atrophy due to Menopause Take a single Estradiol/Norethindrone Acetate tablet orally once daily for the treatment of moderate to severe symptoms of vulvar and vaginal atrophy due to menopause. Estradiol/Norethindrone Acetate Tablets 1 mg/0.5 mg

2.3Prevention of Postmenopausal Osteoporosis Take a single Estradiol/Norethindrone Acetate tablet orally once daily for the prevention of postmenopausal osteoporosis. Estradiol/Norethindrone Acetate Tablets 1 mg/0.5 mg Estradiol/Norethindrone Acetate Tablets 0.5 mg/0.1 mg

💊 Dosage Forms and Strengths 109 words ▾

3 DOSAGE FORMS AND STRENGTHS Estradiol/Norethindrone Acetate Tablets are available in two strengths: Each tablet of Estradiol/Norethindrone Acetate 1 mg/ 0.5 mg contains 1 mg of estradiol and 0.5 mg of norethindrone acetate. The tablets are white, convex, coated tablets debossed with "B" on one side and "474" on the other side. Each tablet of Estradiol/Norethindrone Acetate 0.5 mg/ 0.1 mg contains 0.5 mg of estradiol and 0.1 mg of norethindrone acetate.

The tablets are white, convex, coated tablets debossed with "B" on one side and "623" on the other side. Estradiol/Norethindrone Acetate 1 mg/0.5 mg tablet ( 3 ) Estradiol/Norethindrone Acetate 0.5 mg/0.1 mg tablet ( 3 )

⛔ Contraindications 204 words ▾

4 CONTRAINDICATIONS Estradiol/Norethindrone Acetate Tablets are contraindicated in women with any of the following conditions: Undiagnosed abnormal genital bleeding [see Warnings and Precautions (5.2) ] Breast cancer or history of breast cancer [see Warnings and Precautions (5.2) ] Estrogen-dependent neoplasia [see Warnings and Precautions (5.2) ] Active DVT, PE, or history of these conditions [see Warnings and Precautions (5.1) ] Active arterial thromboembolic disease (for example, stroke and MI), or a history of these conditions [see Warnings and Precautions (5.1) ] Known anaphylactic reaction, angioedema, or hypersensitivity to Estradiol/Norethindrone Acetate Tablets Hepatic impairment or disease Protein C, protein S, or antithrombin deficiency, or other known thrombophilic disorders Undiagnosed abnormal genital bleeding ( 4 ) Breast cancer or a history of breast cancer ( 4 , 5.2 ) Estrogen-dependent neoplasia ( 4 , 5.2 ) Active DVT, PE, or history of these conditions ( 4 , 5.1 ) Active arterial thromboembolic disease (for example, stroke and MI), or a history of these conditions ( 4 , 5.1 ) Known anaphylactic reaction, angioedema, or hypersensitivity to Estradiol/Norethindrone Acetate Tablets ( 4 ) Hepatic impairment or disease ( 4 , 5.10 ) Protein C, protein S, or antithrombin deficiency, or other known thrombophilic disorders ( 4 )

⚠️ Warnings and Cautions ~3 min read ▾

5 WARNINGS AND PRECAUTIONS Estrogens increase the risk of gall bladder disease ( 5.4 ) Discontinue estrogen if severe hypercalcemia, loss of vision, severe hypertriglyceridemia or cholestatic jaundice occurs ( 5.5 , 5.6 , 5.9 , 5.10 ) Monitor thyroid function in women on thyroid replacement therapy ( 5.11 , 5.18 )

5.1Cardiovascular Disorders Increased risks of PE, DVT, stroke and MI are reported with estrogen plus progestin therapy. Increased risks of stroke and DVT are reported with estrogen-alone therapy. Immediately discontinue estrogen with or without progestogen therapy if any of these occur or is suspected.

Manage appropriately any risk factors for arterial vascular disease (for example, hypertension, diabetes mellitus, tobacco use, hypercholesterolemia, and obesity) and/or venous thromboembolism (VTE) (for example, personal history or family history of VTE, obesity, and systemic lupus erythematosus). Stroke The WHI estrogen plus progestin substudy reported a statistically significant increased risk of stroke in women 50 to 79 years of age receiving daily CE (0.625 mg) plus MPA (2.5 mg) compared to women in the same age group receiving placebo (33 versus 25 strokes per 10,000 women-years) [see Clinical Studies (14.5) ] .

The increase in risk was demonstrated after the first year and persisted. 1 Immediately discontinue estrogen with or without progestogen therapy if a stroke occurs or is suspected. The WHI estrogen-alone substudy reported a statistically significant increased risk of stroke in women 50 to 79 years of age receiving daily CE (0.625 mg)-alone compared to women in the same age group receiving placebo (45 versus 33 strokes per 10,000 women-years, respectively).

The increase in risk was demonstrated in year 1 and persisted [see Clinical Studies (14.5) ] . Immediately discontinue estrogen-alone therapy if a stroke occurs or is suspected. Subgroup analyses of women 50 to 59 years of age suggest no increased risk of stroke for those women receiving CE (0.625 mg)-alone versus those receiving placebo (18 versus 21 per 10,000 women-years).

1 Coronary Heart Disease The WHI estrogen plus progestin substudy reported an increased risk (not statistically significant) of coronary heart disease (CHD) events (defined as nonfatal MI, silent MI, or CHD death) in those women receiving daily CE (0.625 mg) plus MPA (2.5 mg) compared to women receiving placebo (41 versus 34 per 10,000 women-years). 1 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 (14.5) ] .

The WHI estrogen-alone substudy reported no overall effect on CHD events in women receiving estrogen-alone compared to placebo 2 [see Clinical Studies (14.5) ]. Subgroup analyses of women 50 to 59 years of age, who were less than 10 years since menopause, suggest a reduction (not statistically significant) in CHD events in those women receiving daily CE (0.625 mg)-alone compared to placebo (8 versus 16 per 10,000 women-years). 1 In postmenopausal women with documented heart disease (n=2,763), average 66.7 years of age, 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) plus MPA (2.5 mg) demonstrated no cardiovascular benefit.

During an average follow-up of 4.1 years, treatment with CE plus MPA did not reduce the overall rate of CHD events in postmenopausal women with established CHD. There were more CHD events in the CE plus MPA-treated group than in the placebo group in year 1, but not during the subsequent years. Two thousand three hundred 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 plus MPA group and the placebo group in HE… [Excerpted — this section continues on DailyMed.]

🤒 Adverse Reactions ~3 min read ▾

6 ADVERSE REACTIONS The following serious adverse reactions are discussed elsewhere in the labeling: Cardiovascular Disorders [see Boxed Warning , Warnings and Precautions (5.1) ] Malignant Neoplasms [see Boxed Warning , Warnings and Precautions (5.2) ] The most common adverse reactions (incidence ≥ 5 percent) with Estradiol/Norethindrone Acetate Tablets are: back pain, headache, pain in the extremity, nausea, diarrhea, gastroenteritis, insomnia, emotional lability, upper respiratory tract infection, sinusitis, nasopharyngitis, weight increase, breast pain, post-menopausal bleeding, uterine fibroid vaginal hemorrhage, ovarian cyst, endometrial thickening, viral infection, moniliasis genital, and accidental injury.

( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact Breckenridge Pharmaceutical, Inc. at 1-800-367-3395 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch.

6.1Clinical 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 practice. Adverse reactions reported with Estradiol/Norethindrone Acetate Tablets 1 mg/0.5 mg by investigators during clinical trials regardless of causality assessment are shown in Table 1. TABLE 1 ALL TREATMENT-EMERGENT ADVERSE REACTIONS REGARDLESS OF RELATIONSHIP REPORTED AT A FREQUENCY OF ≥ 5 PERCENT WITH ESTRADIOL/NORETHINDRONE ACETATE TABLETS 1 MG/0.5 MG Endometrial Hyperplasia Study (12-Months) Vasomotor Symptoms Study (3-Months) Osteoporosis Study (2-Years) Estradiol/Norethindrone Acetate Tablets 1 mg/0.5 mg 1 mg E 2 Estradiol/Norethindrone Acetate Tablets 1 mg/0.5 mg Placebo Estradiol/Norethindrone Acetate Tablets 1 mg/0.5 mg Placebo (n=295) (n=296) (n=29) (n=34) (n=47) (n=48) Body as a Whole Back Pain 6% 5% 3% 3% 6% 4% Headache 16% 16% 17% 18% 11% 6% Digestive System Nausea 3% 5% 10% 0% 11% 0% Gastroenteritis 2% 2% 0% 0% 6% 4% Nervous System Insomnia 6% 4% 3% 3% 0% 8% Emotional Lability 1% 1% 0% 0% 6% 0% Respiratory System Upper Respiratory Tract Infection 18% 15% 10% 6% 15% 19% Sinusitis 7% 11% 7% 0% 15% 10% Metabolic and Nutritional Weight Increase 0% 0% 0% 0% 9% 6% Urogenital System Breast Pain 24% 10% 21% 0% 17% 8% Post-Menopausal Bleeding 5% 15% 10% 3% 11% 0% Uterine Fibroid 5% 4% 0% 0% 4% 8% Ovarian Cyst 3% 2% 7% 0% 0% 8% Resistance Mechanism Infection Viral 4% 6% 0% 3% 6% 6% Moniliasis Genital 4% 7% 0% 0% 6% 0% Secondary Terms Injury Accidental 4% 3% 3% 0% 17% including one upper extremity fracture in each group 4% Other Events 2% 3% 3% 0% 6% 4% Adverse reactions reported with Estradiol/Norethindrone Acetate Tablets 0.5 mg/0.1 mg by investigators during clinical trials regardless of causality assessment are shown in Table 2.

TABLE 2 ALL TREATMENT-EMERGENT ADVERSE REACTIONS REGARDLESS OF RELATIONSHIP REPORTED AT A FREQUENCY OF ≥ 5 PERCENT WITH ESTRADIOL/NORETHINDRONE ACETATE TABLETS

0.5MG/0.1 MG Estradiol/Norethindrone Acetate Tablets 0.5 mg/0.1 mg (n=194) Placebo (n=200) Body as a Whole Back Pain 10% 4% Headache 22% 19% Pain in extremity 5% 4% Digestive System Nausea 5% 4% Diarrhea 6% 6% Respiratory System Nasopharyngitis 21% 18% Urogenital System Endometrial thickening 10% 4% Vaginal hemorrhage 26% 12%

6.2Postmarketing Experience The following adverse reactions have been identified during post-approval use of Estradiol/Norethindrone Acetate Tablets. 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. Genitourinary System Changes in vaginal bleeding pattern and abnormal withdrawal bleeding or flow; breakthrough bleeding; spotting; dysmenorrhea, increase in size of uterine leiomyomata; vaginitis, including vaginal candidiasis; change in amount of cervical secretion; changes in cervical ectropion; pre-menstrual-like syn… [Excerpted — this section continues on DailyMed.]

🔄 Drug Interactions 181 words ▾

7 DRUG INTERACTIONS Co-administration of estradiol with norethindrone acetate did not elicit any apparent influence on the pharmacokinetics of norethindrone acetate. Similarly, no relevant interaction of norethindrone acetate on the pharmacokinetics of estradiol was found within the NETA dose range investigated in a single dose study. Inducers and/or inhibitors of CYP3A4 may affect estrogen drug metabolism and decrease or increase the estrogen plasma concentration.

( 7 ) Estradiol 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 result in adverse reactions. Norethindrone Acetate Drugs or herbal products that induce or inhibit cytochrome P-450 enzymes, including CYP3A4, may decrease or increase the serum concentrations of norethindrone.

🔄 Drug / Laboratory Test Interactions 194 words ▾

5.18Drug-Laboratory Test Interactions Accelerated prothrombin time, partial thromboplastin time, and platelet aggregation time; increased platelet count; increased factors II, VII antigen, VIII coagulant activity, IX, X, XII, VII-X complex, and beta-thromboglobulin; decreased levels of anti-factor Xa and antithrombin III, decreased antithrombin III activity, increased levels of fibrinogen and fibrinogen activity; increased plasminogen antigen and activity. Increased thyroid-binding globulin (TBG) levels leading to increased circulating total thyroid hormone levels as measured by protein-bound iodine (PBI), T 4 levels (by column or by radioimmunoassay), or T 3 levels by radioimmunoassay.

T 3 resin uptake is decreased, reflecting the elevated TBG. Free T 4 and free T 3 concentrations are unaltered. Women on thyroid replacement therapy may require higher doses of thyroid hormone.

Other binding proteins may be elevated in serum, for example, corticosteroid binding globulin (CBG), sex hormone-binding globulin (SHBG), leading to increased total circulating corticosteroids and sex steroids, respectively. Free hormone concentrations, such as testosterone and estradiol, may be decreased. Other plasma proteins may be increased (angiotensinogen/rennin substrate, alpha-1 antitrypsin, ceruloplasmin).

Increased plasma high-density lipoprotein (HDL) and HDL 2 cholesterol subfraction concentration, reduced low-density lipoprotein (LDL) cholesterol concentration, increased triglyceride levels. Impaired glucose tolerance.

👥 Use in Specific Populations ~2 min read ▾

8 USE IN SPECIFIC POPULATIONS

8.1Pregnancy Risk Summary Estradiol/Norethindrone Acetate Tablets are not indicated for use in pregnancy. There are no data with the use of Estradiol/Norethindrone Acetate Tablets in pregnant women; however, epidemiologic studies and meta-analyses have not found an increased risk of genital or nongenital birth defects (including cardiac anomalities and limb-reduction defects) following exposure to combined hormonal contraceptives (estrogen and progestins) before conception or during early pregnancy. In the U.S. general population, the estimated background risk of major birth defects and miscarriage in clinically recognized pregnancies is 2% to 4% and 15% to 20%, respectively.

8.2Lactation Risk Summary Estrogens plus progestogens are present in human milk and can reduce milk production in breast-feeding women. This reduction can occur at any time but is less likely to occur once breast-feeding is well established. The developmental and health benefits of breastfeeding should be considered along with the mother's clinical need for Estradiol/Norethindrone Acetate Tablets and any potential adverse effects on the breastfed child from Estradiol/Norethindrone Acetate Tablets or from the underlying maternal condition.

8.4Pediatric Use Estradiol/Norethindrone Acetate Tablets are not indicated for use in pediatric patients. Clinical studies have not been conducted in the pediatric population.

8.5Geriatric Use There have not been sufficient numbers of geriatric women involved in clinical studies utilizing Estradiol/Norethindrone Acetate Tablets to determine whether those over 65 years of age differ from younger subjects in their response to Estradiol/Norethindrone Acetate Tablets. The Women's Health Initiative Studies In the WHI estrogen plus progestin substudy (daily CE [0.625 mg] plus MPA [2.5 mg] versus placebo), there was a higher relative risk of nonfatal stroke and invasive breast cancer in women greater than 65 years of age [see Clinical Studies (14.5) ] .

In the WHI estrogen-alone substudy (daily CE [0.625 mg]-alone versus placebo), there was a higher relative risk of stroke in women greater than 65 years of age [see Clinical Studies (14.5) ] . The Women's Health Initiative Memory Study In the WHIMS ancillary studies of postmenopausal women 65 to 79 years of age, there was an increased risk of developing probable dementia in women receiving estrogen plus progestin or estrogen-alone when compared to placebo. It is unknown whether this finding applies to younger postmenopausal women [see Warnings and Precautions (5.3) , and Clinical Studies (14.6) ] .

Since both ancillary studies were conducted in women 65 to 79 years of age, it is unknown whether these findings apply to younger postmenopausal women 8 [see Warnings and Precautions (5.3) , and Clinical Studies (14.6) ] .

🤰 Pregnancy 94 words ▾

8.1Pregnancy Risk Summary Estradiol/Norethindrone Acetate Tablets are not indicated for use in pregnancy. There are no data with the use of Estradiol/Norethindrone Acetate Tablets in pregnant women; however, epidemiologic studies and meta-analyses have not found an increased risk of genital or nongenital birth defects (including cardiac anomalities and limb-reduction defects) following exposure to combined hormonal contraceptives (estrogen and progestins) before conception or during early pregnancy. In the U.S. general population, the estimated background risk of major birth defects and miscarriage in clinically recognized pregnancies is 2% to 4% and 15% to 20%, respectively.

🧒 Pediatric Use 24 words ▾

8.4Pediatric Use Estradiol/Norethindrone Acetate Tablets are not indicated for use in pediatric patients. Clinical studies have not been conducted in the pediatric population.

🧓 Geriatric Use ~1 min read ▾

8.5Geriatric Use There have not been sufficient numbers of geriatric women involved in clinical studies utilizing Estradiol/Norethindrone Acetate Tablets to determine whether those over 65 years of age differ from younger subjects in their response to Estradiol/Norethindrone Acetate Tablets. The Women's Health Initiative Studies In the WHI estrogen plus progestin substudy (daily CE [0.625 mg] plus MPA [2.5 mg] versus placebo), there was a higher relative risk of nonfatal stroke and invasive breast cancer in women greater than 65 years of age [see Clinical Studies (14.5) ] .

In the WHI estrogen-alone substudy (daily CE [0.625 mg]-alone versus placebo), there was a higher relative risk of stroke in women greater than 65 years of age [see Clinical Studies (14.5) ] . The Women's Health Initiative Memory Study In the WHIMS ancillary studies of postmenopausal women 65 to 79 years of age, there was an increased risk of developing probable dementia in women receiving estrogen plus progestin or estrogen-alone when compared to placebo. It is unknown whether this finding applies to younger postmenopausal women [see Warnings and Precautions (5.3) , and Clinical Studies (14.6) ] .

Since both ancillary studies were conducted in women 65 to 79 years of age, it is unknown whether these findings apply to younger postmenopausal women 8 [see Warnings and Precautions (5.3) , and Clinical Studies (14.6) ] .

🆘 Overdosage 42 words ▾

10 OVERDOSAGE Overdosage of estrogen plus progestogen may cause nausea, vomiting, breast tenderness, abdominal pain, drowsiness and fatigue, and withdrawal bleeding may occur in women. Treatment of overdose consists of discontinuation of Estradiol/Norethindrone Acetate Tablets therapy with institution of appropriate symptomatic care.

🧬 Clinical Pharmacology ~2 min read ▾

12 CLINICAL PHARMACOLOGY

12.1Mechanism 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 feedback mechanism.

Estrogens act to reduce the elevated levels of these hormones seen in postmenopausal women. Progestin compounds enhance cellular differentiation and generally oppose the actions of estrogens by decreasing estrogen receptor levels, increasing local metabolism of estrogens to less active metabolites, or inducing gene products that blunt cellular responses to estrogen. Progestins exert their effects in target cells by binding to specific progesterone receptors that interact with progesterone response elements in target genes.

Progesterone receptors have been identified in the female reproductive tract, breast, pituitary, hypothalamus, and central nervous system.

12.2Pharmacodynamics Generally, a serum estrogen concentration does not predict an individual woman's therapeutic response to Estradiol/Norethindrone Acetate tablets nor her risk for adverse outcomes. Likewise, exposure comparisions across different estrogen products to infer efficacy or safety for the individual woman may not be valid.

12.3Pharmacokinetics Absorption Estradiol Estradiol is absorbed through the gastrointestinal tract. Following oral administration of Estradiol/Norethindrone Acetate tablets, peak plasma estradiol concentrations are reached within 5 to 8 hours. The oral bioavailability of estradiol following administration of Estradiol/Norethindrone Acetate Tablets, 1 mg/0.5 mg when compared to a combination oral solution is 53%.

Administration of Estradiol/Norethindrone Acetate Tablets, 1 mg/0.5 mg with food did not modify the bioavailability of estradiol. Norethindrone Acetate After oral administration, norethindrone acetate is absorbed and transformed to norethindrone. Norethindrone reaches a peak plasma concentration within 0.5 to 1.5 hours after the administration of Estradiol/Norethindrone Acetate Tablets.

The oral bioavailability of norethindrone following administration of Estradiol/Norethindrone Acetate Tablets 1 mg/0.5 mg when compared to a combination oral solution is 100%. Administration of Estradiol/Norethindrone Acetate Tablets 1 mg/0.5 mg with food increases norethindrone AUC 0-72 by 19% and decreases C max by 36%. The pharmacokinetic parameters of estradiol (E 2 ), estrone (E 1 ), and norethindrone (NET) following oral administration of 1 Estradiol/Norethindrone Acetate Tablets 1 mg/0.5 mg or 2 Estradiol/Norethindrone Acetate Tablets 0.5 mg/0.1 mg tablet(s) to healthy postmenopausal women are summarized in Table 3.

TABLE 3 PHARMACOKINETIC PARAMETERS AFTER ADMINISTRATION OF 1 TABLET OF ESTRADIOL/NORETHINDRONE ACETATE TABLETS 1 MG/0.5 MG OR 2 TABLETS OF ESTRADIOL/NORETHINDRONE ACETATE TABLETS

0.5MG/0.1 MG TO HEALTHY POSTMENOPAUSAL WOMEN 1 × Estradiol/Norethindrone Acetate Tablets 1 mg/0.5 mg (n=24) Mean… [Excerpted — this section continues on DailyMed.]

🧬 Mechanism of Action ~1 min read ▾

12.1Mechanism 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 feedback mechanism.

Estrogens act to reduce the elevated levels of these hormones seen in postmenopausal women. Progestin compounds enhance cellular differentiation and generally oppose the actions of estrogens by decreasing estrogen receptor levels, increasing local metabolism of estrogens to less active metabolites, or inducing gene products that blunt cellular responses to estrogen. Progestins exert their effects in target cells by binding to specific progesterone receptors that interact with progesterone response elements in target genes.

Progesterone receptors have been identified in the female reproductive tract, breast, pituitary, hypothalamus, and central nervous system.

📦 How Supplied / Storage and Handling 22 words ▾

16 HOW SUPPLIED/STORAGE AND HANDLING Product: 50090-8003 NDC: 50090-8003-0 28 TABLET, FILM COATED in a BLISTER PACK / 1 in a CARTON

📋 Description 177 words ▾

11 DESCRIPTION Estradiol/Norethindrone Acetate Tablets 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. Estradiol/Norethindrone Acetate Tablets 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), copovidone, talc, magnesium stearate, hypromellose and triacetin.

Estradiol 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 C 18 H 24 O 2 , ½ H 2 O and a molecular weight of 281.4. The structural formula of E 2 is as follows: Estradiol Norethindrone acetate (NETA) 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 C 22 H 28 O 3 and molecular weight of 340.5. The structural formula of NETA is as follows: Norethindrone Acetate Chemical Structure Chemical Structure

💬 Information for Patients 115 words ▾

17 PATIENT COUNSELING INFORMATION Advise women to read the FDA-approved patient labeling (Patient Information) Vaginal Bleeding Inform postmenopausal women to report any vaginal bleeding to their healthcare provider as soon as possible [see Warnings and Precautions (5.2) ] . Possible Serious Adverse Reactions with Estrogen Plus Progestogen Therapy Inform postmenopausal women of possible serious adverse reactions of estrogen plus progestogen therapy including Cardiovascular Disorders, Malignant Neoplasms, and Probable Dementia [see Warnings and Precautions (5.1 , 5.2 , 5.3) ] .

Possible Common Adverse Reactions with Estrogen Plus Progestogen Therapy Inform postmenopausal women of possible less serious but common adverse reactions of estrogen plus progestogen therapy such as headache, breast pain and tenderness, nausea and vomiting.

🧬 Pharmacokinetics ~3 min read ▾

12.3Pharmacokinetics Absorption Estradiol Estradiol is absorbed through the gastrointestinal tract. Following oral administration of Estradiol/Norethindrone Acetate tablets, peak plasma estradiol concentrations are reached within 5 to 8 hours. The oral bioavailability of estradiol following administration of Estradiol/Norethindrone Acetate Tablets, 1 mg/0.5 mg when compared to a combination oral solution is 53%.

Administration of Estradiol/Norethindrone Acetate Tablets, 1 mg/0.5 mg with food did not modify the bioavailability of estradiol. Norethindrone Acetate After oral administration, norethindrone acetate is absorbed and transformed to norethindrone. Norethindrone reaches a peak plasma concentration within 0.5 to 1.5 hours after the administration of Estradiol/Norethindrone Acetate Tablets.

The oral bioavailability of norethindrone following administration of Estradiol/Norethindrone Acetate Tablets 1 mg/0.5 mg when compared to a combination oral solution is 100%. Administration of Estradiol/Norethindrone Acetate Tablets 1 mg/0.5 mg with food increases norethindrone AUC 0-72 by 19% and decreases C max by 36%. The pharmacokinetic parameters of estradiol (E 2 ), estrone (E 1 ), and norethindrone (NET) following oral administration of 1 Estradiol/Norethindrone Acetate Tablets 1 mg/0.5 mg or 2 Estradiol/Norethindrone Acetate Tablets 0.5 mg/0.1 mg tablet(s) to healthy postmenopausal women are summarized in Table 3.

TABLE 3 PHARMACOKINETIC PARAMETERS AFTER ADMINISTRATION OF 1 TABLET OF ESTRADIOL/NORETHINDRONE ACETATE TABLETS 1 MG/0.5 MG OR 2 TABLETS OF ESTRADIOL/NORETHINDRONE ACETATE TABLETS

0.5MG/0.1 MG TO HEALTHY POSTMENOPAUSAL WOMEN 1 × Estradiol/Norethindrone Acetate Tablets 1 mg/0.5 mg (n=24) Mean geometric mean; (%CV) geometric % coefficient of variation; 2 × Estradiol/Norethindrone Acetate Tablets 0.5 mg/0.1 mg (n=24) Mean (%CV) AUC = area under the curve, 0 – last quantifiable sample C max = maximum plasma concentration, t max = time at maximum plasma concentration, t 1/2 = half-life, Estradiol baseline unadjusted data; (E 2 ) AUC 0-t (pg/mL*h) 766.5 (48) 697.3 (53) C max (pg/mL) 26.8 (36) 26.5 (37) t max (h): median (range) 6.0 (0.5-16.0) 6.5 (0.5-16.0) t 1/2 (h) baseline unadjusted data ; 14.0 n=18; (29) 14.5 n=16; (27) Estrone (E 1 ) AUC 0-t (pg/mL*h) 4469.1 (48) 4506.4 (44) C max (pg/mL) 195.5 (37) 199.5 (30) t max (h): median (range) 6.0 (1.0-9.0) 6.0 (2.0-9.0) t 1/2 (h) 10.7 (44) n=13; 11.8 (25) Norethindrone (NET) AUC 0-t (pg/mL*h) 21043 (41) 8407.2 (43) C max (pg/mL) 5249.5 (47) 2375.4 (41) t max (h) : median (range) 0.7 (0.7-1.25) 0.8 (0.7-1.3) t 1/2 (h) 9.8 (32) n=22; 11.4 (36) n=21 Following continuous dosing with once-daily administration of Estradiol/Norethindrone Acetate Tablets 1 mg/0.5 mg, serum concentrations of estradiol, estrone, and norethindrone reached steady-state within two weeks with an accumulation of 33 to 47% above concentrations following single dose administration.

Unadjusted circulating concentrations of E 2 , E 1 , and NET during Estradiol/Norethindrone Acetate Tablets 1 mg/0.5 mg treatment at steady-state (dosing at time 0) are provided in Figures 1a and 1b. Figure 1a: Mean Baseline-Uncorrected Estradiol and Estrone Serum Concentration-Time Profiles Following Multiple Doses of Estradiol/Norethindrone Acetate Tablets 1 mg/0.5 mg (N=24) Figure 1b: Mean Baseline-Uncorrected Norethindrone Serum Concentration-Time Profile Following Multiple Doses of Estradiol/Norethindrone Acetate Tablets 1 mg/0.5 mg (N=24) Figure 1a Figure 1b Distribution Estradiol 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. Estradiol circulates in the blood bound to SHBG (37%) and to albumin (61%), while only approximately 1 to 2% is unbound. Norethindrone Acetate Norethindrone also binds to a similar extent to SHBG (36%) and to albumin (61%).

Metabolism Estr… [Excerpted — this section continues on DailyMed.]

🧬 Pharmacodynamics 45 words ▾

12.2Pharmacodynamics Generally, a serum estrogen concentration does not predict an individual woman's therapeutic response to Estradiol/Norethindrone Acetate tablets nor her risk for adverse outcomes. Likewise, exposure comparisions across different estrogen products to infer efficacy or safety for the individual woman may not be valid.

🔬 Clinical Studies ~3 min read ▾

14 CLINICAL STUDIES

14.1Effects on Vasomotor Symptoms in Postmenopausal Women In a 12-week randomized clinical trial involving 92 subjects, Estradiol/Norethindrone Acetate Tablets 1 mg/0.5 mg was compared to 1 mg of estradiol and to placebo. The mean number and intensity of hot flushes were significantly reduced from baseline to week 4 and 12 in both the Estradiol/Norethindrone Acetate Tablets 1 mg/0.5 mg and the 1 mg estradiol group compared to placebo (see Figure 2 ). Figure 2 Mean Weekly Number of Moderate and Severe Hot Flushes in a 12-Week Study In a study conducted in Europe a total of 577 postmenopausal women were randomly assigned to either Estradiol/Norethindrone Acetate Tablets 0.5 mg/0.1 mg, 0.5 mg E 2 /0.25 mg NETA, or placebo for 24 weeks of treatment.

The mean number and severity of hot flushes were significantly reduced at week 4 and week 12 in the Estradiol/Norethindrone Acetate Tablets 0.5 mg/0.1 mg (see Figure 3 ) and 0.5 mg E 2 /0.25 mg NETA groups compared to placebo. Figure 3 Mean Number of Moderate to Severe Hot Flushes for Weeks 0 Through 12 Figure 2 Figure 3

14.2Effects on the Endometrium in Postmenopausal Women Estradiol/Norethindrone Acetate Tablets 1 mg/0.5 mg reduced the incidence of estrogen-induced endometrial hyperplasia at 1 year in a randomized, controlled clinical trial. This trial enrolled 1,176 postmenopausal women who were randomized to one of 4 arms: 1 mg estradiol unopposed (n=296), 1 mg E 2 + 0.1 mg NETA (n=294), 1 mg E 2 + 0.25 mg NETA (n=291), and Estradiol/Norethindrone Acetate Tablets 1 mg/0.5 mg (n=295). At the end of the study, endometrial biopsy results were available for 988 women.

The results of the 1 mg estradiol unopposed arm compared to Estradiol/Norethindrone Acetate Tablets 1 mg/0.5 mg are shown in Table 4. TABLE 4 INCIDENCE OF ENDOMETRIAL HYPERPLASIA WITH UNOPPOSED ESTRADIOL AND ESTRADIOL/NORETHINDRONE ACETATE TABLETS 1 MG/0.5 MG IN A 12-MONTH STUDY 1 mg E 2 (n=296) Estradiol/Norethindrone Acetate Tablets 1 mg E 2 /0.5 mg NETA (n=295) 1 mg E 2 /0.25 mg NETA (n=291) 1 mg E 2 /0.1 mg NETA (n=294) No. of subjects with histological evaluation at the end of the study 247 241 251 249 No. (%) of subjects with endometrial hyperplasia at the end of the study 36 (14.6%) 1 (0.4%) 1 (0.4%) 2 (0.8%)

14.3Effects on Uterine Bleeding or Spotting in Postmenopausal Women During the initial months of therapy, irregular bleeding or spotting occurred with Estradiol/Norethindrone Acetate Tablets 1 mg/0.5 mg treatment. However, bleeding tended to decrease over time, and after 12 months of treatment with Estradiol/Norethindrone Acetate Tablets 1 mg/0.5 mg, about 86 percent of women were amenorrheic (see Figure 4 ). Figure 4 Patients Treated with Estradiol/Norethindrone Acetate Tablets 1 mg/0.5 mg with Cumulative Amenorrhea over Time Percentage of Women with no Bleeding or Spotting at any Cycle Through Cycle 13 Intent to Treat Population, LOCF Note: the percentage of patients who were amenorrheic in a given cycle and through cycle 13 is shown.

If data were missing, the bleeding value from the last reported day was carried forward (LOCF). In the clinical trial with Estradiol/Norethindrone Acetate Tablets 0.5 mg/0.1 mg, 88 percent of women were amenorrheic after 6 months of treatment (See Figure 5 ). Figure 5 Patients Treated with Estradiol/Norethindrone Acetate Tablets 0.5 mg/0.1 mg with Cumulative Amenorrhea over Time Percentage of Women with no Bleeding or Spotting at any Cycle Through Cycle 6, Intent to Treat Population, LOCF Figure 4 Figure 5

14.4Effects on Bone Mineral Density in Postmenopausal Women The results of two randomized, multicenter, calcium-supplemented (500 to 1,000 mg per day), placebo-controlled, 2 year clinical trials have shown that Estradiol/Norethindrone Acetate Tablets 1 mg/0.5 mg and estradiol 0.5 mg are effective in preventing bone loss in postmenopausal women. A total of 462 postmenopausal women with intact uteri and baseline BMD values for lumbar spine within 2 stand… [Excerpted — this section continues on DailyMed.]

🧪 Nonclinical Toxicology 35 words ▾

13 NONCLINICAL TOXICOLOGY

13.1Carcinogenesis, 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.

📄 Carcinogenesis, Mutagenesis, Impairment of Fertility 32 words ▾

13.1Carcinogenesis, 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.

📚 References ~1 min read ▾

15 REFERENCES 1. Rossouw JE, et al. Postmenopausal Hormone Therapy and Risk of Cardiovascular Disease by Age and Years Since Menopause.

JAMA . 2007;297:1465-1477. 2.

Hsia J, et al. Conjugated Equine Estrogens and Coronary Heart Disease. Arch Int Med .

2006;166:357-365. 3. Cushman M, et al.

Estrogen Plus Progestin and Risk of Venous Thrombosis. JAMA . 2004;292:1573-1580.

4. Curb JD, et al. Venous Thrombosis and Conjugated Equine Estrogen in Women Without a Uterus.

Arch Int Med . 2006;166:772-780. 5.

Chlebowski RT, et al. Influence of Estrogen Plus Progestin on Breast Cancer and Mammography in Healthy Postmenopausal Women. JAMA .

2003;289:3234-3253. 6. Stefanick ML, et al.

Effects of Conjugated Equine Estrogens on Breast Cancer and Mammography Screening in Postmenopausal Women With Hysterectomy. JAMA . 2006;295:1647-1657.

7. Anderson GL, et al. Effects of Estrogen Plus Progestin on Gynecologic Cancers and Associated Diagnostic Procedures.

JAMA . 2003;290:1739-1748. 8.

Shumaker SA, et al. Conjugated Equine Estrogens and Incidence of Probable Dementia and Mild Cognitive Impairment in Postmenopausal Women. JAMA .

2004;291:2947-2958. 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.

📄 Patient Package Insert ~3 min read ▾

Patient Information Estradiol/Norethindrone Acetate Tablets, for oral use Read this Patient Information before you start using Estradiol/Norethindrone Acetate Tablets 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 the most important information I should know about Estradiol/Norethindrone Acetate Tablets (a combination of estrogen and progestogen)? Do not use estrogens with or without progestogens to prevent heart disease, heart attacks, strokes, or dementia (decline of brain function). Using estrogens with progestogens may increase your chances of getting heart attacks, strokes, breast cancer, or blood clots.

Using estrogens with progestogens may increase your chance of getting dementia, based on a study of women 65 years of age and older. Using estrogen-alone may increase your chance of getting cancer of the uterus (womb). Do not use estrogen-alone to prevent heart disease, heart attacks, strokes, or dementia (decline in brain function).

Using estrogen-alone may increase your chances of getting strokes or blood clots. Using estrogen-alone may increase your chance of getting dementia, based on a study of women 65 years of age and older. Only one estrogen with progestogen product and dose have been shown to increase your chances of getting heart attacks, strokes, breast cancer, blood clots, and dementia.

Only one estrogen-alone product and dose have been shown to increase your chances of getting strokes, blood clots, and dementia. Because other products and doses have not been studied in the same way, it is not known how the use of Estradiol/Norethindrone Acetate Tablets will affect your chances of these conditions. You and your healthcare provider should talk regularly about whether you still need treatment with Estradiol/Norethindrone Acetate Tablets.

What is Estradiol/Norethindrone Acetate Tablets? Estradiol/Norethindrone Acetate Tablets are a prescription medicine that contains two kinds of hormones, an estrogen and a progestogen. What is Estradiol/Norethindrone Acetate Tablets used for?

Estradiol/Norethindrone Acetate Tablets are used after menopause to: Reduce moderate to severe hot flushes Estrogens are hormones made by a woman's ovaries. The ovaries normally stop making estrogens when a woman is between 45 and 55 yrs 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 estrogen levels begin dropping, some women get very uncomfortable symptoms, such as feelings of warmth in the face, neck, and chest, or sudden, intense 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. Treat moderate to severe menopausal changes in and around the vagina You and your healthcare provider should talk regularly about whether you still need treatment with Estradiol/Norethindrone Acetate Tablets 1.0 mg/0.5 mg to treat these problems. If you use Estradiol/Norethindrone Acetate Tablets 1.0 mg/0.5 mg only to treat your menopausal changes in and around your vagina, talk with your healthcare provider about whether a topical vaginal product would be better for you.

Help reduce your chances of getting osteoporosis (thin weak bones) Osteoporosis from menopause is a thinning of the bones that makes them weaker and easier to break. If you use Estradiol/Norethindrone Acetate Tablets to prevent osteoporosis due to menopause, talk with your healthcare provider about whether a different treatment or medicine without estrogens might be better for you. You and your healthcare provider should talk regularly about whether you still need treatment with E… [Excerpted — this section continues on DailyMed.]

📄 Recent Major Changes 3 words ▾

Boxed Warning 08/2021

📄 Package Label / Principal Display Panel 6 words ▾

Estradiol and Norethindrone Acetate Label Image

Source: FDA Structured Product Labeling, mirrored from DailyMed / openFDA. Prefer the government’s original formatting? View this label on DailyMed ↗

Reported adverse events (FAERS)

Read carefully: FAERS reports are voluntary and unverified. Counts are not incidence, do not establish causation, are subject to reporting bias, and cannot be used to compare one drug to another. Shown for signal context only. Reports for Estradiol / Norethindrone Acetate (this brand).

Top reported reactions

Fatigue18
Hot Flush18
Headache17
Nausea14
Depression13
Pain In Extremity13
Dizziness12

Reporter sex

205 reports

Serious outcomes

Life-threatening7
Death6
Reports over time (by year) — tap or hover for the count & year
2019 2021 2023 2026 24 0
Most recent year is provisional (FAERS lags ~3 months).
Where does this data come from?
Adverse-event reports from the FDA Adverse Event Reporting System (FAERS) via openFDA. FAERS reports are voluntary and unverified — counts are not incidence and don’t establish causation.

About this NDC listing & data coverage

Finished prescription product
What data is (and isn’t) available for this NDC — tap to expand
NDC identity (package / product / labeler codes) ✓ Available
Labeler ✓ Available
Product & package description ✓ Available
Marketing category & status ✓ Available
Active ingredient / dosage form / route ✓ Available
FDA label (SPL via DailyMed) ✓ Available
Package photos ✓ Available
Inactive ingredients (structured) ✓ Available
NADAC pharmacy acquisition price (CMS) — Not published for this NDC CMS publishes NADAC only for NDCs reported in its retail-pharmacy survey.
Orange Book / therapeutic-equivalence data ✓ Available
HCPCS J-code billing crosswalk — Not published for this NDC Most self-administered / retail products have no J-code — that is normal.
Medicaid utilization (CMS SDUD) — Not published for this NDC CMS reports utilization only for NDCs with Medicaid claims above its privacy threshold.
“Not published” reflects what the public FDA / CMS / NLM sources provide for this exact package code — it is a property of the data feeds, not a judgment about the product.

Questions about this listing

Why is there no price listed?
The pricing shown on our NDC pages comes from CMS NADAC, a voluntary survey of retail community pharmacy invoices. CMS does not publish a NADAC for every NDC — packages outside the retail survey (institutional and hospital products, bulk packages, discontinued items, and many OTC items) may never receive one. A missing price reflects the survey's scope, not this product's actual cost, and does not mean the product is free or unavailable.
Is the NDC printed on the package the same as the 11-digit billing NDC?
Yes, they identify this exact package in different formats. The form printed on the packaging and shown on DailyMed is the one the FDA registered. Insurance claims use a fixed 11-digit 5-4-2 format, so the short segment is padded with a leading zero and the dashes are dropped. The Identity section at the top of this page lists each form of this code.
Is this package still being marketed?
Yes, per the latest FDA NDC Directory data on this page: this package is listed as actively marketed, with no marketing end date reported by A-S Medication Solutions. Listing status can change — the directory data on this page refreshes weekly.
Who lists this product with the FDA?
A-S Medication Solutions is the labeler of record for this NDC — the company under whose FDA-assigned code the package is listed. The labeler may be the manufacturer itself or a distributor marketing the product under its own code.
Do I need a prescription for this product?
This NDC is listed with FDA as a prescription product, so it is dispensed under a prescriber's order. Your pharmacist can tell you whether any over-the-counter forms of the same medication exist.
This page identifies an FDA-listed package (the NDC) and reports public regulatory and pricing data about the listing. It is reference information, not a medical recommendation — talk to your pharmacist or prescriber about your own medication.
Where does this data come from?
Listing facts (marketing category, packager status, marketing dates) from the FDA openFDA NDC Directory; label availability from DailyMed; pricing coverage from CMS NADAC; equivalence scope from the FDA Orange Book.
← 50090-8002-00 · A-S 50090-8004-00 · A-S →
For educational and professional reference only — not medical advice. Pricing reflects published NADAC and CMS ASP (free public data) and may differ from your acquisition cost; always verify before billing or dispensing.