How long does hormone therapy take to work for hormone receptor-positive breast cancer?

Hormone receptor-positive cells can receive growth signals from hormones. Treatment either lowers those signals or blocks their action. That biological effect can begin before you notice anything, while a measurable change in a lump, scan, or symptom may take longer. The purpose may be to reduce recurrence risk after initial treatment or to control cancer that is active elsewhere, and the review method differs between these situations.

Your team considers the medicine, receptor results, disease location, earlier treatments, and your health when deciding when to review you. Side effects such as hot flushes or joint symptoms do not show whether the cancer is responding.

Take your medicine at the prescribed time and tell your team about missed doses, new prescriptions, or supplements. Keep records of pain, swelling, breathlessness, fatigue, and treatment effects. Attend the planned examination, scan, or blood test; these checks are more useful than judging response from how you feel on a particular day. See [Hormone Therapy for Cancer](/treatments/systemic-therapy/hormone-therapy-for-cancer/) for related information.

Call your oncology team about a new or growing lump, persistent bone or back pain, new weakness, worsening breathlessness, or side effects that interfere with eating, sleeping, or walking. Seek emergency care for chest pain, severe breathlessness, sudden weakness, or confusion. Do not wait for a scheduled response review if a symptom changes quickly.

Ask whether your treatment is intended to prevent recurrence or control known cancer, how your team will measure response, and when the first review is planned. Ask which side effects can be managed, which require a prompt call, and what alternatives may be considered if the medicine is difficult to tolerate.