Why is oestradiol used in hormone replacement therapy?

Oestradiol is a form of oestrogen. During the menopause transition, ovarian oestrogen production changes and may contribute to hot flushes, night sweats, vaginal dryness, sleep disruption, and other symptoms. Replacing oestrogen can reduce these symptoms for some people and can help treat vaginal and urinary symptoms when used in a suitable form.

Oestradiol may be prescribed as a patch, gel, spray, tablet, or local vaginal preparation. The route changes where the medicine acts and how it enters the bloodstream. People who still have a uterus commonly need a progestogen alongside systemic oestradiol to protect the womb lining; this is a separate hormone with a different role.

Tell your clinician about previous blood clots, unexplained vaginal bleeding, liver disease, migraine pattern, breast or womb conditions, and medicines you take. Discuss whether systemic or local treatment fits your symptoms, how the prescription will be reviewed, and what to do if bleeding occurs. Use the prescribed product as directed and do not change the route or amount without advice.

Report new or persistent vaginal bleeding after starting or changing therapy, especially after a period without bleeding. Seek urgent care for chest pain, sudden breathlessness, coughing blood, one-sided leg swelling, sudden weakness, or a severe new headache. These symptoms can have causes unrelated to oestradiol, but they need prompt assessment.

Ask which symptoms the treatment is intended to address, whether you need a progestogen, and which formulation suits your medical history. Clarify when the first review should happen, how unexpected bleeding will be assessed, and whether local treatment could meet your needs.