Safety
Boxed warning: every estradiol tablet, patch and gel label we read warns that estrogen alone raises the risk of endometrial cancer in women with a uterus, and that adding a progestogen lowers the risk of endometrial hyperplasia. The generic tablet and patch labels on DailyMed on Oct 18, 2026 (Climara included) still also carry the older boxed warning on stroke, blood clots, heart attack, breast cancer and probable dementia from the Women’s Health Initiative. The FDA approved removing those statements in February 2026, and revised labels such as Divigel gel (02/2026) now box only the endometrial cancer warning. Do not use estrogen to prevent heart disease or dementia. Estrogen is not for people with unexplained vaginal bleeding, breast cancer or an estrogen-dependent cancer, a past blood clot, stroke or heart attack, liver disease or a clotting disorder. Gels and sprays can pass to children and pets through skin contact; the Evamist label boxes this warning.
Talk to a licensed clinician about your health history and every medication you take before you start.
Legal status
Prescription only; FDA-approved. FDA-approved and sold as generics; not a controlled substance. A pharmacy may compound estradiol only for an individual prescription, and not as an essential copy of an approved product.
What estradiol is
On Nov 10, 2025 the FDA said it would remove the cardiovascular, breast cancer and probable dementia statements from menopausal hormone boxed warnings and recommend starting systemic therapy within 10 years of menopause or before age 60. It approved the first revised labels on Feb 12, 2026; the rest are updating product by product.
FDA-approved for
- Moderate to severe hot flashes and night sweats due to menopause
- Moderate to severe vaginal dryness and atrophy due to menopause (tablets)
- Prevention of postmenopausal osteoporosis (tablets and some patches)
- Low estrogen from hypogonadism, removal of the ovaries or primary ovarian failure (tablets)
Dosing
Tablets, gels and sprays once a day; patches once or twice a week depending on the product (Climara is once a week). Tablets 0.5 mg, 1 mg and 2 mg. Climara patches start at 0.025 mg a day and go up to 0.1 mg a day. Divigel gel 0.25 mg to 1.25 mg of estradiol a day, on the thigh. Labels say to start at the lowest effective dose and re-evaluate periodically. Your clinician sets the dose for you.
How well it works
In a Climara trial, the 0.05 mg patch cut weekly hot flushes from 46 to 20 (67%) and the 0.1 mg patch from 52 to 16 (72%), compared with an 18% drop on placebo. In a 12-week trial of 495 women, Divigel 0.5 g and 1.0 g a day reduced moderate to severe hot flushes significantly more than placebo by week 4. Individual results vary.
Estradiol cost
None of the online providers we compare publishes a price for estradiol tablets, patches, gels or sprays. For a full breakdown, read How much does HRT cost without insurance?. For the steps, read How to get HRT online.