Estrogens, Conjugated (Usp)
Conjugated estrogens are a mixture of naturally occurring estrogen hormones used primarily for hormone replacement therapy in women experiencing menopause or those with estrogen deficiency conditions. They help alleviate menopausal symptoms such as hot flashes, vaginal dryness, and can be used to prevent postmenopausal osteoporosis.
Conjugated estrogens provide hormone replacement for menopausal symptoms and estrogen-deficient conditions by replacing declining natural estrogens.
Key facts at a glance
- ATC
- G03CA57
- RxNorm
- 4099
- Generic
- Estrogens, Conjugated (Usp)
- Class
- atc-g03
- Brands
- Duavee, Premarin
- Availability
- rx
- Lactation
- unknown
- Routes
- oral, vaginal
- Forms
- tablet, injection, cream
- Regions
- US, EU, CN, JP
- Monitoring
- —
This page is for informational purposes only.
Do not use this information to diagnose yourself or to replace a physician's advice. Always consult a qualified healthcare provider before starting, stopping, or changing any medication. If you believe you are experiencing a medical emergency, call your local emergency number immediately.
Dosage and administration
- Usual dose
- 0.625mg daily
- Maximum
- consult physician
- Frequency
- once daily
- Instructions
- Follow physician instructions
- Duration limits
- as prescribed
- Monitoring
- standard
- Usual dose
- 0.3mg daily
- Maximum
- consult physician
- Frequency
- once daily
- Instructions
- Follow physician instructions
- Duration limits
- as prescribed
- Monitoring
- standard
- Usual dose
- 0.3mg daily
- Maximum
- consult physician
- Frequency
- once daily
- Instructions
- Follow physician instructions
- Duration limits
- as prescribed
- Monitoring
- standard
Overdose information
Special Populations
9 groupspregnancy
first trimesteravoid completely
Do not use during pregnancy. Contraception should be used during treatment.
N/A - drug should not be used
Use of this medication in this population requires careful consideration of risks and benefits.
pregnancy
second third trimesteravoid completely
Discontinue if pregnancy occurs. Do not use to support pregnancy.
N/A - drug should not be used
Use of this medication in this population requires careful consideration of risks and benefits.
lactation
breastfeedingavoid during breastfeeding
Estrogens pass into breast milk and may reduce milk production. Do not use while breastfeeding.
Monitor infant for developmental changes
Use of this medication in this population requires careful consideration of risks and benefits.
geriatric
elderlyuse lowest effective dose for shortest duration
Use with caution due to increased risk of cardiovascular events, stroke, venous thromboembolism, and breast cancer. Assess risk-benefit annually.
Regular blood pressure, mammogram, and cardiovascular risk assessment
Use with caution and monitor for adverse effects.
pediatric_age
adolescentsuse only if clearly needed with careful monitoring
Use only for approved pediatric indications such as hormone deficiency. Not for growth stimulation.
Monitor growth plates, bone age, and hormonal levels
Use with caution and monitor for adverse effects.
renal_impairment
moderate to severeadjust dose based on renal function; use lowest effective dose
Use with caution in patients with renal impairment. Estrogens may affect fluid and electrolyte balance.
Monitor renal function and fluid status periodically
Use with caution and monitor for adverse effects.
hepatic_impairment
milduse with caution, monitor liver function
Use with caution. Monitor liver function tests regularly.
Regular liver function tests
Use with caution and monitor for adverse effects.
hepatic_impairment
moderate to severeavoid completely
Contraindicated in patients with liver disease, cholestatic jaundice, or hepatic impairment.
N/A - drug should not be used
Use of this medication in this population requires careful consideration of risks and benefits.
alcohol_users
chronic alcohol uselimit alcohol consumption during therapy
Limit alcohol intake as it may increase estrogen metabolism and liver stress. Avoid excessive alcohol consumption.
Periodic liver function tests
Use with caution and monitor for adverse effects.
Statistics and clinical data
Drug class
Hormone replacement therapy drug class
Common uses
Therapeutic indications
First FDA approval
Historical prescribing information
Mechanism of action
Pharmacological mechanism
Treatment of moderate to severe vasomotor symptoms associated with menopause, atrophic vaginitis, female hypogonadism, primary ovarian insufficiency, and prevention of postmenopausal osteoporosis.
Estrogens bind to nuclear estrogen receptors, modulating gene transcription in target tissues to maintain urogenital health, bone density, and alleviate menopausal symptoms.
Should be used at the lowest effective dose for the shortest duration consistent with treatment goals. Associated risks include venous thromboembolism, stroke, and endometrial cancer (with unopposed estrogen). Individual risk assessment is essential. Not for use during pregnancy.
Contraindications
Conditions and patient states where this medication should be avoided or used with caution.
Do not use (1)
Known allergy to this medication or its components
Use caution (1)
Consult healthcare provider for benefits vs risks assessment
Official drug label
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This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 24, 2026. · Read our editorial policy