What to expect from hormone therapy for metastatic breast cancer

Your oncology team may recommend tablets, injections, or both. The choice depends on whether the cancer has hormone receptors, previous treatment, your menopausal status, and where the cancer has spread. Treatment is generally given over repeated cycles or on a continuing schedule rather than as a single procedure.

Possible effects include hot flushes, night sweats, tiredness, joint or muscle aches, mood changes, vaginal dryness, and changes in sexual comfort. Some medicines can affect bone strength or cholesterol, so your team may review symptoms and arrange blood tests or other checks. Hormone therapy may be used alone or alongside targeted treatment, radiotherapy, or medicines for symptoms.

Take each dose exactly as prescribed and keep a record of injections, symptoms, and other medicines. Tell the team about contraception needs, fertility concerns, bone problems, liver disease, and any supplements. Do not stop treatment because of a new symptom without contacting the oncology service; a dose change or supportive medicine may help.

Gentle movement, layered clothing, regular fluids, and a consistent sleep routine can make some effects easier to manage. Ask whether you need bone health advice, a medication review, or a plan for travel and missed doses.

Contact your oncology team promptly for new or worsening pain, marked weakness, persistent vomiting, unusual bleeding, yellowing of the skin, or swelling and pain in a limb. Seek urgent help for chest pain, severe breathlessness, sudden confusion, a new seizure, or sudden loss of strength or speech. These symptoms need assessment because they may reflect the cancer, treatment effects, or another illness.

Ask whether your cancer is hormone-receptor positive, which medicine is planned, how it is given, and how response will be checked. You can also ask which side effects should be reported the same day, how bone health will be monitored, and what options exist if the treatment stops working.