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Out-of-hours emergency

Fever on Chemotherapy — When You Cannot Reach Your Team

If you have a fever during chemotherapy and cannot get through to your oncologist, this is still an emergency. Go to the nearest hospital with an emergency department — any hospital — right now. Do not wait for a callback.

Medically reviewed by Dr. N. Kiranmayee, Medical Oncologist · Last reviewed September 2026

  • Go now — You do not need your oncologist's permission to go to an emergency department. Go immediately.
  • Any hospital can help — A district or government hospital that has never seen your case before can still start the treatment you need.
  • Say the words — Tell triage: 'I am on chemotherapy and I have a fever.' Those words change how quickly you are seen.
  • Do not wait until morning — Fever during chemotherapy can become dangerous within hours. Morning is too late.
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Go to the nearest hospital emergency department now — do not wait to reach your oncologist. A fever during chemotherapy may mean your infection-fighting cells are dangerously low, and this can become life-threatening within hours. Tell the triage nurse that you are on chemotherapy. That single fact changes everything about how you are assessed.

If a symptom below applies to you, do not wait for a callback. Call 1800-202-8726 or go to your nearest emergency department.

If you are worried right now, call

Our helpline is answered by clinical staff. If a symptom is on the list above, do not wait for a callback — call, or go to your nearest emergency department.

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How is fever on chemotherapy different from an ordinary fever?

FeatureOrdinary feverFever on chemotherapy — treat as emergency
What it meansYour body is fighting a common infectionYour body may have too few white cells to fight any infection at all
How dangerousUsually self-limiting; improves with restCan become life-threatening within hours, even if you feel 'okay right now'
What helps at homeFluids and rest often workNothing — hospital treatment is what works, not home management
Who to contactYour GP, or monitor and seeNearest emergency department now, without waiting for a callback
Typically startsAny time; often follows illness in the householdMost likely in the days after a chemotherapy session, when white cells are at their lowest — but can occur at any point in treatment

What do you say when you arrive at the emergency department?

The moment you reach triage, say: 'I am on chemotherapy and I have a fever.' You do not need to remember the drug names or the dosages. Those words are enough to flag that you need urgent assessment.

If you have a chemotherapy treatment card or a letter from your cancer hospital, hand it over. If you do not have it with you, name the hospital and the doctor treating you — that is all the staff need to start helping.

The emergency department should check your blood count as a priority to see whether your white cells are low. They do not need guidance from your oncologist before they can act. Any trained emergency team knows how to assess and begin treatment for fever in a chemotherapy patient.

Do not leave without being seen. If the waiting area is full, tell the staff again that you are on chemotherapy. You are in the right place.

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Common questions

Frequently asked questions

Can I wait until morning to call my oncologist?

No. Fever during chemotherapy can move from manageable to life-threatening within a few hours, and that window does not pause overnight. The right action at 1am is the same as at 1pm: go to the nearest emergency department. You can update your oncologist from hospital in the morning.

What if the nearest hospital has no experience with chemotherapy patients?

Go anyway. The critical first steps — checking your blood count, monitoring your observations, starting treatment — do not require specialist oncology equipment. Any trained emergency team can take them. Your cancer hospital can advise that team remotely if needed. Being far from a specialist centre is not a reason to wait at home.

What will they do to me at the emergency department?

You will have blood taken to check your white cell count and look for signs of infection. Your temperature, pulse, and blood pressure will be checked closely. Depending on the results, you may be admitted for treatment or assessed and monitored. The process moves quickly once the team knows you are on chemotherapy — which is why saying it the moment you arrive matters.

Should I take paracetamol to bring the fever down before going?

Do not let that question delay you — go to the emergency department first. Paracetamol can lower a temperature and make you feel better, which risks making the situation seem less urgent than it is. The emergency team needs to see your actual temperature and how you are really doing. Ask the staff about paracetamol when you arrive, not before you leave the house.

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