What to expect from chemotherapy for metastatic breast cancer

Metastatic breast cancer has spread beyond the breast or nearby lymph nodes, so chemotherapy travels through the bloodstream to reach cancer cells in different areas. Your oncologist may select a single medicine or a combination based on tumour features, previous medicines, the areas affected, blood tests, and how you are feeling. Treatment can be given by infusion or tablet, with reviews between cycles.

Possible effects include tiredness, nausea, taste changes, appetite changes, mouth soreness, bowel changes, hair loss, and changes in blood counts. Pain, bone symptoms, or breathlessness from metastatic disease may need dedicated treatment as well. The aim is often to control cancer and help you live as well as possible, while balancing benefit and unwanted effects.

Keep a record of symptoms, medicines, and questions. Ask about anti-nausea treatment before leaving the unit, and plan lighter tasks around days when energy is lower. Tell your team about numbness, new pain, fever, infection exposure, supplements, and any change in menstrual or reproductive health. Discuss contraception and fertility if they are relevant to you.

Call your oncology team promptly for fever, chills, worsening pain, new breathlessness, persistent vomiting, severe diarrhoea, confusion, or unexpected bleeding. Seek emergency help for severe breathing difficulty, collapse, chest pressure, or sudden weakness. Do not wait for a scheduled scan or appointment when a symptom is rapidly worsening.

What is the goal of this chemotherapy for me? How will we decide whether to continue or change it? Which side effects are treatable at home, and which require urgent advice? How can treatment fit with work, family responsibilities, and symptom control?