Estradiol: what it is, how it works, and what to expect
Estradiol is a form of oestrogen used in hormone replacement therapy and other treatments. Here's what the medication does, how to take it, and what side effects are possible.
What estradiol is
Estradiol is a form of oestrogen, a hormone your body produces naturally. It's used in hormone replacement therapy (HRT) to ease menopausal symptoms, in gender-affirming care, and to treat certain medical conditions where oestrogen levels are low.
How estradiol works
Estradiol replaces or supplements the oestrogen your body isn't producing enough of. It works on oestrogen receptors throughout your body to reduce hot flushes, night sweats, vaginal dryness, and other symptoms of low oestrogen. The exact way it works depends on why you're taking it.
How to take it
Estradiol comes in multiple forms: tablets, patches, gels, sprays, and injections. Your doctor will prescribe the form and dose that suits your situation. Patches and gels deliver estradiol through your skin; tablets you swallow; injections go into muscle or under the skin.
Take tablets at the same time each day. Apply patches and gels to clean, dry skin as directed. Follow your doctor's instructions precisely, as dosing varies widely between people and conditions.
Side effects
Common side effects include nausea, headaches, breast tenderness, and mood changes. Most settle within a few weeks. Serious side effects are rare but can include blood clots and stroke; your doctor will assess your individual risk before prescribing.
Key things to know
Estradiol is not a quick fix; benefits take weeks to appear. You'll need regular check-ups while taking it. Tell your doctor about any personal or family history of blood clots, breast cancer, or stroke before starting. Some medications and supplements interact with estradiol, so be clear about what else you're taking.