Hearing the words chemotherapy or radiotherapy can feel overwhelming. These treatments are different, and the plan depends on the cancer type, stage, treatment goal and the patient's overall health. Your oncology team should explain the expected benefits, schedule and possible side effects before treatment begins.
What is chemotherapy?
Chemotherapy uses medicines to destroy cancer cells or slow their growth. It may be given through a vein, by mouth or in other ways. Treatment is often organised into cycles with rest periods. The number of cycles varies; there is no single schedule for every patient.
What is radiotherapy?
Radiotherapy uses carefully planned radiation to treat a specific area. It may be used alone or alongside surgery or medicines. The number of sessions and side effects depend on the body area treated and the dose.
Common side effects
Possible effects include tiredness, nausea, vomiting, appetite changes, mouth soreness, diarrhoea or constipation, hair loss with some medicines, and skin changes in the treated area. Not everyone experiences the same effects. Ask the team which symptoms are expected and which need urgent attention.
Food and hydration during treatment
Follow the advice of your oncology team or dietitian. Choose safe, freshly prepared, well-cooked foods and drink fluids as advised. Small, frequent meals may be easier when appetite is low. If mouth sores, swallowing difficulty, diarrhoea or vomiting affect eating, ask for tailored advice. Do not start supplements or restrictive diets without checking for interactions.
When to call the treatment team
Ask for the team's written emergency instructions. Contact them promptly for fever or chills, repeated vomiting, inability to keep fluids down, severe diarrhoea, new bleeding, breathing difficulty, confusion or rapidly worsening symptoms. If the patient appears seriously unwell, seek emergency care.
Important: This article is general education, not an individual treatment or diet plan. Every patient should receive instructions from their own oncology team.
Official information and further reading
- National Cancer Institute: Nutrition during cancer treatment
- Government of India: Standard treatment guidance on radiotherapy
This article is for general awareness only. It is not a diagnosis, prescription or substitute for personalised medical advice. Medical content should be reviewed by a qualified clinician before publication. Scheme rules, hospital services and helpline details can change; verify them with official sources.