Estradioldrug info
90 DAY estradiol 0.000313 MG/HR Vaginal System [Estring]
What it is used for
ESTRING is indicated for the treatment of moderate to severe symptoms of vulvar and vaginal atrophy due to menopause.
Text above is quoted in full from the FDA-approved drug label published by openFDA, effective April 23, 2026. Matched to this product by RxNorm code. Cross-references to other sections of the full prescribing information have been removed, since they point to a document not shown here. Nothing else is changed: no sentence is shortened, reworded or summarised.
Description
ESTRING ® (estradiol vaginal system) is a slightly opaque ring with a whitish core containing a drug reservoir of 2 mg estradiol. Estradiol, silicone polymers, barium sulfate and silicone fluid (as dispersing agent) are combined to form the ring. When placed in the vagina, ESTRING releases estradiol, approximately 7.5 mcg per day, in a consistent stable manner over 90 days. ESTRING has the following dimensions: outer diameter 55 mm; cross-sectional diameter 9 mm; core diameter 2 mm. One ESTRING should be inserted into the upper third of the vaginal vault, to be worn continuously for three months. Estradiol is chemically described as estra-1, 3, 5-triene-3, 17β-diol. The molecular formula of estradiol is C 18 H 24 O 2 and the structural formula is: The molecular weight of estradiol is 272.39. Chemical Structure
Text above is quoted in full from the FDA-approved drug label published by openFDA, effective April 23, 2026. Matched to this product by RxNorm code. Cross-references to other sections of the full prescribing information have been removed, since they point to a document not shown here. Nothing else is changed: no sentence is shortened, reworded or summarised.
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