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Gemcitabine (Gemcite, Gemtaz, Oncogem) What to Expect

Medically reviewed by Dr. T. Raghavender Reddy, Medical Oncologist, MBBS · DM (Medical Oncology) · MD (Radiation Oncology) · Last reviewed September 2026

Gemcitabine is a chemotherapy medicine used in several cancers, given as a short intravenous infusion in day care. Many people notice flu-like symptoms — fever, muscle aches, fatigue — in the hours after each dose. These are a direct effect of the medicine and usually settle within 24 hours.

Medically reviewed by Dr. T. Raghavender Reddy, Medical Oncologist, MBBS · DM (Medical Oncology) · MD (Radiation Oncology) · Last reviewed September 2026

Prescription-only medicine.

Gemcitabine is a prescription-only chemotherapy medicine. It is prepared and administered under the supervision of a specialist oncology team in a clinical setting. Nothing on this page should inform a decision to start, change or stop treatment; those decisions rest with your treating oncologist. It is not suitable for everyone — see who this is not for below.

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In short

Gemcitabine is a chemotherapy medicine given as an intravenous infusion in day care, used across several cancers. Many people develop flu-like symptoms — fever, muscle aches, fatigue — in the hours after each dose. These are caused by the medicine, not an infection, and usually settle within 24 hours.

In detail

What is gemcitabine and how is it given?

Gemcitabine is an antimetabolite — a type of chemotherapy that disrupts the way cancer cells copy their DNA. It is used in a number of cancers, including pancreatic cancer, non-small-cell lung cancer, bladder cancer, breast cancer and ovarian cancer.

It is given as an intravenous infusion in a day-care setting. The infusion typically takes around 30 minutes, and most people go home the same day.

In India it is sold under several brand names, including Gemcite, Gemtaz and Oncogem. The active medicine is the same regardless of the brand.

In detail

Why does gemcitabine cause flu-like symptoms — and is it an infection?

Flu-like symptoms — fever, chills, muscle aches, generalised fatigue — are a recognised and common effect of gemcitabine. They usually appear within a few hours of the infusion and settle on their own within 24 hours.

This is the medicine's direct effect, not a sign of infection and not a sign that your body is rejecting the treatment. It does not mean the chemotherapy has stopped working.

Fever during chemotherapy can also be caused by infection from low white blood cell counts, which is a different and more urgent situation. Tell your team about any fever on the day it occurs. They will determine which it is — you should not try to distinguish them at home.

Eligibility

Who should not receive gemcitabine?

Gemcitabine is not suitable for everyone. Eligibility is decided by an oncologist on the individual case, based on your diagnosis, blood results, organ function and overall fitness.

Have severe suppression of bone marrow function, reflected in very low blood counts before treatment
Have severely impaired kidney function, since gemcitabine is cleared primarily through the kidneys
Have severe liver impairment
Are pregnantGemcitabine is known to harm a developing foetus
Are breastfeeding
Have a known hypersensitivity or allergy to gemcitabine

Caution is also required in people with moderate kidney or liver impairment, active lung disease, or prior radiation to the chest, as gemcitabine can increase sensitivity to radiation effects in the lung. Your oncologist will review your full history before recommending this medicine.

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At a glance

What the terms on your side-effect sheet mean

MyelosuppressionThe medicine temporarily reduces your bone marrow's ability to make blood cells. This is why your team checks your blood counts before each cycle and may delay or adjust treatment if the counts fall too low.

Flu-like syndromeFever, chills, muscle aches and fatigue appearing in the hours after an infusion. With gemcitabine this is a direct drug effect, not an immune reaction to infection.

ThrombocytopeniaA lower-than-normal platelet count, which can make you bruise or bleed more easily. Blood tests before each cycle check whether it is safe to proceed.

ProteinuriaProtein appearing in your urine. Your team may check your urine periodically during treatment. Most cases are mild, but your team will monitor it alongside your kidney function.

OedemaSwelling, usually in the legs or around the face. Tell your team if you notice puffiness that is new or getting worse between appointments.

Worth knowing

Did you know?

Gemcitabine does not typically cause complete hair loss when used as a single agent — a meaningful difference from many other intravenous chemotherapy medicines.

If your regimen combines gemcitabine with other medicines, ask your oncologist specifically about hair loss for your combination, as the risk depends on what is added.

Source: NCCN Drug Information: Gemcitabine

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Common questions

Frequently asked questions

Will I lose my hair on gemcitabine?

Significant hair loss is not typical with gemcitabine as a single agent. Hair thinning is possible, but most people keep their hair. If you are receiving gemcitabine in combination with other medicines — which is common for several cancers — the answer depends on what is being combined. Ask your oncologist about hair loss for your specific regimen, not gemcitabine alone, so you get an accurate picture of what to expect.

How sick will I feel after each infusion?

Many people tolerate gemcitabine better than they expect. Nausea, if it occurs, is usually mild to moderate and does not prevent eating or normal activity for most people. The more typical experience is flu-like fatigue and a mild fever in the hours immediately after the infusion, which tends to settle by the following morning. Your team will give you anti-nausea medicine if needed and will adjust the plan if your symptoms are difficult to manage.

My temperature went up after the infusion — should I go to hospital?

Call your oncology team the same day, even if the fever feels mild. Fever after gemcitabine has two possible explanations: the expected flu-like effect of the medicine, or infection caused by low white blood cell counts, which needs urgent assessment and treatment. You cannot reliably tell them apart at home, and neither can your family. Your team will ask about your temperature and other symptoms and direct you. If you cannot reach your team promptly, go to the nearest hospital emergency department and tell them you are receiving chemotherapy.

Can I take paracetamol for the muscle aches?

Ask your oncology team before taking any medicine for the flu-like symptoms, including paracetamol. It may be appropriate, but your team needs to know about your temperature before it is treated — not after. A masked fever can delay the assessment for infection that your team needs to make. Some teams advise taking it only after they have spoken to you. Follow your team's specific guidance rather than a general recommendation.

How often will I need blood tests during treatment?

Blood tests are done before each cycle to check your blood counts, kidney function and liver function. This is not routine caution — gemcitabine directly reduces bone marrow output, and the kidneys clear it from your body, so these results determine whether it is safe to proceed with each dose. If your counts are too low, your team may delay the next dose or adjust it. Both are standard adjustments, not signs that treatment has failed.

Can I carry on working or going out normally during treatment?

Many people remain active during gemcitabine treatment. The main constraints are the day or two after each infusion, when flu-like fatigue is most likely, and the days when your blood counts are at their lowest, when your team may advise caution around crowded places and people who are unwell. How much treatment affects your daily life depends on your dose and schedule and how your body responds, which varies between people. Ask your team when in your cycle your counts are likely to be lowest, so you can plan around those days.

Who would be treating you

The medical oncologists on the CION panel

Chemotherapy is prescribed, dosed and supervised by a medical oncologist. These are the six on the CION panel.

Dr. Naresh Gundu

Medical Oncologist

MBBS · DNB Internal Medicine (Sir Gangaram, New Delhi) · DM Medical Oncology (AIIMS)

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Dr. C. Raghavendra Reddy

Medical Oncologist

MBBS (Gold Medal) · DNB · DM (Medical Oncology, Gold Medal) · Kukatpally

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Dr. Bharati Devi Gorantla

Medical Oncologist

MBBS · MD · DM (Adyar, Chennai) · ECMO · MRCP SCE (UK)

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Dr. Owais Mohammed

Medical Oncologist

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Dr. T. Raghavender Reddy

Medical Oncologist

MBBS · DM (Medical Oncology) · MD (Radiation Oncology) · L.B. Nagar

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Dr. N. Kiranmayee

Medical Oncologist

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Which oncologist you see depends on the centre nearest you and on what your treatment involves. Tell us where you are and we will point you to the closest.

Talk it through

Reading about a medicine is not the same as being told what to expect

This page explains what the medicine does in general. What it cannot tell you is how your own regimen was chosen, what your schedule looks like, or which of these effects apply to you — that needs your reports and a conversation.

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