How does hormone therapy for cancer work?

Some cancers carry receptors that respond to oestrogen, progesterone, or other hormones. A medicine may block a receptor, reduce hormone production, or stop a hormone from activating the cancer cell. Tamoxifen is one example of a receptor-blocking medicine. Treatment can be used after local therapy to reduce the chance of regrowth, before another treatment, or when cancer has spread. Its value depends on the tumour’s receptor findings, location, prior treatment, and overall health. Hormone therapy is different from chemotherapy, although a care plan may include both.

Take the medicine on the schedule provided and tell the oncology team about every prescription, supplement, and over-the-counter product. Do not stop suddenly without advice, even if side effects are troublesome. Keep a record of hot flushes, sleep changes, mood symptoms, joint discomfort, sexual symptoms, or unusual bleeding. Follow planned visits so the team can review symptoms, examination findings, and whether the treatment remains suitable. Ask which symptoms can be managed and which medicines should be avoided.

Contact the oncology team promptly for unexpected vaginal bleeding, a new breast or chest change, severe breathlessness, chest pain, one-sided leg swelling, sudden weakness, or a severe headache. These symptoms have several possible causes, but they need timely assessment. Report persistent or worsening treatment effects early so support can be offered before they interfere with daily activities.

Does my tumour have hormone receptors? Which medicine is recommended and for how long? What benefit is the treatment intended to provide? Which side effects need urgent attention? What should I do if I miss a dose?