Conjugated Estrogens

Product NDC
66993-298
11-digit product format
669930298
Labeler code
66993
Product ID
66993-298_ce793f9e-0c20-43e6-9dc0-064e5c82e243
Type
HUMAN PRESCRIPTION DRUG
Nonproprietary name
estrogens, conjugated
Dosage form
TABLET, FILM COATED
Route
ORAL
Labeler
Prasco Laboratories
Application
NDA004782
Marketing category
NDA AUTHORIZED GENERIC
Marketing start
2026-02-27
Substance
ESTROGENS, CONJUGATED
Active strength
.9 mg/1
Pharmacologic classes
Estrogen Receptor Agonists [MoA], Estrogen [EPC], Estrogens, Conjugated (USP) [CS]
NDC exclude flag
No
Listing certified through
2027-12-31
Current FDA listing
Yes

Orange Book products#

Application-product, Trade name, Ingredient table
Application-productTrade nameIngredientStrengthDosage form / routeTE codesRLD / RSApproval date
N004782-001PREMARINESTROGENS, CONJUGATED1.25MGTABLET / ORALABRLD, RS, Approved before 1982
N004782-002PREMARINESTROGENS, CONJUGATED2.5MGTABLET / ORALApproved before 1982
N004782-003PREMARINESTROGENS, CONJUGATED0.3MGTABLET / ORALABRLD, Approved before 1982
N004782-004PREMARINESTROGENS, CONJUGATED0.625MGTABLET / ORALABRLD, RS, Approved before 1982
N004782-005PREMARINESTROGENS, CONJUGATED0.9MGTABLET / ORALABRLD, RS1984-01-26
N004782-006PREMARINESTROGENS, CONJUGATED0.45MGTABLET / ORALABRLD2003-07-16

Therapeutic equivalence codes#

Application-product, TE code table
Application-productTE code
N004782-001AB
N004782-003AB
N004782-004AB
N004782-005AB
N004782-006AB

openFDA label cross-check#

Cross-check layer: openFDA label JSON enriches search and identifies hydration gaps. The DailyMed Structured Product Label remains the canonical label presentation on FDA.report.

Brand, Generic, Manufacturer table
BrandGenericManufacturerSPL set IDEffective dateAvailable safety fieldsJoin
Conjugated EstrogensESTROGENS, CONJUGATEDPrasco Laboratoriesce793f9e-0c20-43e6-9dc0-064e5c82e2432026-02-27Boxed warning, Warnings, Adverse reactionsExact identifier

Boxed warning cross-check#

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boxed warning

WARNING: ENDOMETRIAL CANCER, CARDIOVASCULAR DISORDERS, BREAST CANCER and PROBABLE DEMENTIA WARNING: ENDOMETRIAL CANCER, CARDIOVASCULAR DISORDERS, BREAST CANCER and PROBABLE DEMENTIA See full prescribing information for complete boxed warning. Estrogen-Alone Therapy • There is an increased risk of endometrial cancer in a woman with a uterus who uses unopposed estrogens ( 5.2 ) • Estrogen-alone therapy should not be used for the prevention of cardiovascular disease or dementia ( 5.1 , 5.3 ) • Women's Health Initiative (WHI) estrogen-alone substudy reported increased risks of stroke and deep vein thrombosis (DVT) ( 5.1 ) • The WHI Memory Study (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 ) Estrogen Plus Progestin Therapy • Estrogen plus progestin therapy should not be used for the prevention of cardiovascular disease or dementia ( 5.1 , 5.3 ) • The WHI estrogen plus progestin substudy reported increased risks of stroke, DVT, pulmonary embolism (PE), and myocardial infarction (MI) ( 5.1 ) • The WHI estrogen plus progestin substudy reported increased risks of invasive breast cancer ( 5.2 ) • The 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 ) 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 (5.2) ]. Cardiovascular Disorders and Probable Dementia Estrogen-alone therapy should not be used for the prevention of cardiovascular disease or dementia [see Warnings and Precautions (5.1, 5.3) , and Clinical Studies (14.5, 14.6) ] . The Women's Health Initiative (WHI) estrogen-alone substudy reported increased risks of stroke and deep vein thrombosis (DVT) in postmenopausal women (50 to 79 years of age) during 7.1 years of treatment with daily oral conjugated es...

Warnings cross-check#

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warnings and cautions

5 WARNINGS AND PRECAUTIONS • Estrogens increase the risk of gallbladder disease ( 5.4 ) • Discontinue estrogen if severe hypercalcemia, loss of vision, severe hypertriglyceridemia or cholestatic jaundice occurs ( 5.5 , 5.6 , 5.10 , 5.11 ) • Monitor thyroid function in patients on thyroid replacement therapy ( 5.12 , 5.19 ) 5.1 Cardiovascular Disorders An increased risk of stroke and DVT has been reported with estrogen-alone therapy. An increased risk of PE, DVT, stroke and MI has been reported with estrogen plus progestin therapy. Should any of these events occur or be suspected, estrogen with or without progestin therapy should be discontinued immediately. Risk factors for arterial vascular disease (for example, hypertension, diabetes mellitus, tobacco use, hypercholesterolemia, and obesity) and/or venous thromboembolism (VTE) (for example, personal or family history of VTE, obesity, and systemic lupus erythematosus) should be managed appropriately. Stroke In the WHI estrogen-alone substudy, a statistically significant increased risk of stroke was reported 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 per 10,000 women-years). The increase in risk was demonstrated in Year 1 and persisted [see Clinical Studies (14.5) ] . Should a stroke occur or be suspected, estrogen-alone therapy should be discontinued immediately. 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 In the WHI estrogen plus progestin substudy, a statistically significant increased risk of stroke was reported 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 per 10,000 women-years) [see Clinical Studies (14.5) ] . The increase in risk was demonstrated after the first year and persisted. 1 Should a stroke occur or be suspected, estrogen plus progestin therapy should be discontinued immediately. Coronary Heart Disease In the WHI estrogen-alone substudy, no overall effect on coronary heart disease (CHD) events (defined as nonfatal MI, silent MI, or CHD death) was reported in women receiving estrogen-alone compared to placebo 2 [see Clinical Studies (14....

Adverse reactions cross-check#

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adverse reactions

6 ADVERSE REACTIONS The following serious adverse reactions are discussed elsewhere in labeling: • Cardiovascular Disorders [see Boxed Warning , Warnings and Precautions (5.1) ] • Malignant Neoplasms [see Boxed Warning , Warnings and Precautions (5.2) ] Most common adverse reactions (≥5%) are: abdominal pain, asthenia, pain, back pain, headache, flatulence, nausea, depression, insomnia, breast pain, endometrial hyperplasia, leucorrhea, vaginal hemorrhage, and vaginitis. ( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact Prasco Laboratories at 1-866-525-0688 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch 6.1 Clinical Study 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. During the first year of a 2-year clinical trial with 2,333 postmenopausal women with a uterus between 40 and 65 years of age (88% Caucasian), 1,012 women were treated with CE, and 332 were treated with placebo. Table 1 summarizes treatment-related adverse reactions that occurred at a rate of ≥1% in any treatment group. Table 1: Treatment-Related Adverse Reactions at a Frequency ≥1% Conjugated Estrogens Tablets 0.625 mg (n=348) Conjugated Estrogens Tablets 0.45 mg (n=338) Conjugated Estrogens Tablets 0.3 mg (n=326) Placebo (n=332) Body as a whole Abdominal pain 38 (11) 28 (8) 30 (9) 21 (6) Asthenia 16 (5) 8 (2) 14 (4) 3 (1) Back pain 18 (5) 11 (3) 13 (4) 4 (1) Chest pain 2 (1) 3 (1) 4 (1) 2 (1) Generalized edema 7 (2) 6 (2) 4 (1) 8 (2) Headache 45 (13) 47 (14) 44 (13) 46 (14) Moniliasis 5 (1) 4 (1) 4 (1) 1 (0) Pain 17 (5) 10 (3) 12 (4) 14 (4) Pelvic pain 10 (3) 9 (3) 8 (2) 4 (1) Cardiovascular system Hypertension 4 (1) 4 (1) 7 (2) 5 (2) Migraine 7 (2) 1 (0) 0 3 (1) Palpitation 3 (1) 3 (1) 3 (1) 4 (1) Vasodilatation 2 (1) 2 (1) 3 (1) 5 (2) Digestive system Constipation 7 (2) 6 (2) 4 (1) 3 (1) Diarrhea 4 (1) 5 (1) 5 (2) 8 (2) Dyspepsia 7 (2) 5 (1) 6 (2) 14 (4) Eructation 1 (0) 1 (0) 4 (1) 1 (0) Flatulence 22 (6) 18 (5) 13 (4) 8 (2) Increased appetite 4 (1) 1 (0) 1 (0) 2 (1) Nausea 16 (5) 10 (3) 15 (5) 16 (5) Metabolic and nutritional Hyperlipidemia 2 (1) 4 (1) 3 (1) 2 (1) Peripheral edema 5 (1) 2 (1) 4 (1) 3 (1) Weight gain 11 (3) 10 (3) 8 (2) 14 (4) Musc...

adverse reactions table

Table 1: Treatment-Related Adverse Reactions at a Frequency ≥1%Conjugated Estrogens Tablets 0.625 mg (n=348)Conjugated Estrogens Tablets 0.45 mg (n=338)Conjugated Estrogens Tablets 0.3 mg (n=326)Placebo (n=332)Body as a whole Abdominal pain38 (11)28 (8)30 (9)21 (6) Asthenia 16 (5)8 (2)14 (4)3 (1) Back pain 18 (5)11 (3)13 (4)4 (1) Chest pain 2 (1)3 (1)4 (1)2 (1) Generalized edema 7 (2)6 (2)4 (1)8 (2) Headache 45 (13)47 (14)44 (13)46 (14) Moniliasis 5 (1)4 (1)4 (1)1 (0) Pain 17 (5)10 (3)12 (4)14 (4) Pelvic pain 10 (3)9 (3)8 (2)4 (1)Cardiovascular system Hypertension 4 (1)4 (1)7 (2)5 (2) Migraine 7 (2)1 (0)03 (1) Palpitation 3 (1)3 (1)3 (1)4 (1) Vasodilatation 2 (1)2 (1)3 (1)5 (2)Digestive system Constipation 7 (2)6 (2)4 (1)3 (1) Diarrhea 4 (1)5 (1)5 (2)8 (2) Dyspepsia 7 (2)5 (1)6 (2)14 (4) Eructation 1 (0)1 (0)4 (1)1 (0) Flatulence 22 (6)18 (5)13 (4)8 (2) Increased appetite 4 (1)

Additional Listing Data#

Finished product
Yes
Brand name base
Conjugated Estrogens
Listing expiration
2027-12-31

Active Ingredients#

Ingredient, Strength table
IngredientStrength
ESTROGENS, CONJUGATED.9 mg/1

Harmonized Identifiers#

Field, Values table
FieldValues
UniiIU5QR144QX
Rxcui197660, 197661, 197662, 310197, 403849

DailyMed Product Concepts#

Product concept, Relation, Version table
Product conceptRelationVersionEffective
d95be220-b30e-4165-a12d-f83825b0efb1Product name120160111
882e78d5-69f7-4a43-812f-1c1628241bbcProduct name120150910
2e1ce74f-4938-37b4-e2b4-cfd7971b45eaProduct name120140508
d90784c3-64a2-2f23-9acd-d948d25bf235Product name120140508

DailyMed Package Descriptions#

Package NDC, Product, Description table
Package NDCProductDescriptionFormQuantityStrengthSPL version
66993-298-02Conjugated Estrogens100 in 1 BOTTLETABLET, FILM COATED1001

DailyMed Billing Units#

Package NDC, Billing unit, Product NDC table
Package NDCBilling unitProduct NDCDailyMed indexing SPLSPL versionEffective
66993-298-02EA - Each66993-29876429cee-4294-4825-a716-09237b5a073412026-04-20

DailyMed RxNorm Mappings#

RxCUI, RxNorm string, TTY table
RxCUIRxNorm stringTTYDailyMedSPL version
197660estrogens, conjugated 0.3 MG Oral TabletPSNce793f9e-0c20-43e6-9dc0-064e5c82e2431
403849estrogens, conjugated 0.45 MG Oral TabletPSNce793f9e-0c20-43e6-9dc0-064e5c82e2431
310197estrogens, conjugated 0.625 MG Oral TabletPSNce793f9e-0c20-43e6-9dc0-064e5c82e2431
197661estrogens, conjugated 0.9 MG Oral TabletPSNce793f9e-0c20-43e6-9dc0-064e5c82e2431
197662estrogens, conjugated 1.25 MG Oral TabletPSNce793f9e-0c20-43e6-9dc0-064e5c82e2431
197660estrogens, conjugated (USP) 0.3 MG Oral TabletSCDce793f9e-0c20-43e6-9dc0-064e5c82e2431
403849estrogens, conjugated (USP) 0.45 MG Oral TabletSCDce793f9e-0c20-43e6-9dc0-064e5c82e2431
310197estrogens, conjugated (USP) 0.625 MG Oral TabletSCDce793f9e-0c20-43e6-9dc0-064e5c82e2431
197661estrogens, conjugated (USP) 0.9 MG Oral TabletSCDce793f9e-0c20-43e6-9dc0-064e5c82e2431
197662estrogens, conjugated (USP) 1.25 MG Oral TabletSCDce793f9e-0c20-43e6-9dc0-064e5c82e2431
310197estrogens, conjugated (USP) 625 MCG Oral TabletSYce793f9e-0c20-43e6-9dc0-064e5c82e2431

Packages#

Package NDC, 11-digit format, Description table
Package NDC11-digit formatDescriptionMarketing startSampleExclude flagStatus
66993-298-0266993029802100 TABLET, FILM COATED in 1 BOTTLE (66993-298-02) 2026-02-27NoNoCurrent