Medical Oncologist
Targeted therapy
Sunitinib (Sutent, Sunitix): — Your Complete Guide
Sunitinib is an oral tablet you take at home. It is used for kidney cancer, certain stomach tumours, and some pancreatic tumours. Understanding what it does, what it feels like, and when to call your team makes treatment easier to navigate.
Medically reviewed by Dr. C. Raghavendra Reddy, Medical Oncologist, MBBS (Gold Medal) · DNB · DM (Medical Oncology, Gold Medal) · Last reviewed August 2026
- Oral tablet, taken at home — Unlike intravenous chemotherapy, you take sunitinib as a tablet at home, not by drip at hospital.
- Structured cycles of treatment and rest — Sunitinib is given in cycles — weeks of tablets followed by a planned rest period — to allow your body time to recover.
- Side effects follow the cycle pattern — Most side effects ease during the rest weeks. Knowing which ones to watch for helps you manage them.
- Monitoring is part of treatment — Regular blood tests and blood pressure checks are not optional extras. They catch problems early, when they are simplest to treat.
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Sunitinib (sold as Sutent or Sunitix in India) is an oral targeted therapy for kidney cancer, gastrointestinal stromal tumours, and certain pancreatic neuroendocrine tumours. You take it at home on a structured cycle of treatment days followed by a planned rest period. Regular blood tests and blood pressure checks at clinic are part of treatment.
What happens from the day sunitinib is prescribed?
Pre-treatment baseline tests
Before your first tablet, your team arranges blood tests, a blood pressure reading, and usually a heart trace. These create a reference point so that any change during treatment is picked up early.
Getting your prescription filled
Sunitinib is dispensed from a hospital pharmacy or a specialist retail pharmacy, not a general chemist. In India, the original branded tablet (Sutent) and generic versions including Sunitix are both available. Your team will tell you where to collect it.
Starting your first cycle
You take one tablet at the same time each day. It can be taken with or without food, though taking it with a light meal often helps if nausea is a problem.
Monitoring visits during treatment
You return to clinic during your treatment weeks for blood tests and blood pressure checks. These visits are where problems are caught early. Do not skip them, even if you feel well.
The planned rest period
After your treatment weeks, you take a break from the tablet. Most side effects ease during this time. Your team will explain the length of your rest period before you start your first cycle.
Response assessment scan
After a set number of cycles, your oncologist reviews a scan — usually a CT — to see how the tumour has responded. This result guides whether treatment continues, changes, or stops.
How does sunitinib work?
Sunitinib is a targeted therapy, not chemotherapy. It works by blocking specific proteins — called tyrosine kinases — that cancer cells and tumour blood vessels depend on to grow.
Tumours need new blood vessels to survive beyond a small size. Sunitinib aims to cut off that supply. Without the signals it blocks, the tumour's ability to build new vessels and grow is reduced.
This is different from chemotherapy, which attacks dividing cells throughout the body. Sunitinib acts more selectively, which is why its side effects follow a different pattern — though side effects are still real and need managing.
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Dr. Bharati Devi Gorantla
MBBS, MD(General Medicine), DM(Medical Oncology)(Adyar,Chennai), ECMO, MRCP SCE(UK)
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MBBS, MD (General Medicine), DrNB (Medical Oncology), ECMO, MRCP SCE (Medical Oncology) (UK)
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MBBS (AIIMS), MS (Surgery) (AIIMS), DNB (Surgical Oncology), MRCS (Edinburgh)
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Dr. Vinay Mamidala
MBBS, MS(General Surgery), M.Ch(Surgical Oncology), FMAS, FARIS(Ongoing)
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Dr. Vajja Sandeep Kumar
MBBS, MS (General Surgery), DrNB (Surgical Oncology), FALS Oncology
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Which cancers is sunitinib used for?
Sunitinib is used for three main cancer types. Kidney cancer — specifically renal cell carcinoma — is the most common reason it is prescribed. It is also used for gastrointestinal stromal tumours, usually when a first treatment called imatinib has stopped working. And it is used for advanced or spreading pancreatic neuroendocrine tumours.
NCCN and ESMO guidelines list sunitinib as a standard option for each of these indications. Being prescribed it means this is the established recommendation for your situation, not an experimental approach.
If you are unsure why sunitinib was chosen over other options for your specific cancer, ask your oncologist to explain. That is a reasonable question at any appointment.
What side effects are most common on sunitinib?
Fatigue is the side effect patients mention most often. It tends to be heavier during treatment weeks and eases during the rest period, which gives some predictability.
Hand-foot syndrome is another common one: redness, soreness, or skin thickening on the palms and soles of the feet. Reporting it early — before blisters or cracks appear — usually means it can be managed with simple measures your team will advise.
Sunitinib can raise blood pressure, sometimes significantly. This is why your blood pressure is checked at every visit. Many people need blood pressure tablets during treatment, and that is a routine part of managing the drug, not a sign something has gone wrong.
Some people notice a yellowing of the skin or a change in hair colour. This is a known effect of the drug and is usually harmless, but always tell your team — because yellowing can occasionally indicate a liver issue that needs to be checked separately.
What else should you know about daily life on sunitinib?
Will sunitinib affect my thyroid?
Yes — hypothyroidism, meaning an underactive thyroid, is a recognised side effect of sunitinib. You may notice unusual tiredness, feeling cold when others do not, weight gain, or a slower heart rate. These symptoms are easy to attribute to treatment fatigue in general, which is why your team will check thyroid function through periodic blood tests. If your thyroid is found to be low, a simple replacement tablet corrects it quickly and treatment does not need to stop.
Can I eat grapefruit or take herbal supplements?
Grapefruit and grapefruit juice can interfere with how your body processes sunitinib and should be avoided during treatment. St John's Wort — a herbal remedy widely available for low mood — can reduce the level of sunitinib in your blood and should also be avoided. Before taking any supplement, herbal product, or Ayurvedic preparation, tell your treating team what it is and what you are taking it for. This is not about dismissing traditional practice — it is about making sure nothing interferes with how the treatment works for you.
Why does sunitinib raise blood pressure?
Sunitinib works partly by blocking signals that blood vessels use to widen and grow. When those signals are reduced, blood vessels can become narrower, which raises pressure. This is a predictable and manageable effect of the drug, not a sign of underlying heart disease. Your team will monitor your blood pressure at every visit and prescribe blood pressure tablets if needed. Keeping it controlled during treatment matters, so attend every monitoring visit even when you feel well.
What should I do if I feel very unwell between clinic visits?
Call your oncology team the same day if you develop a fever, cannot keep fluids down, have significant abdominal pain, notice swelling in your legs, feel your heart racing, or have unusual breathlessness. Do not wait for your next scheduled appointment. Your team's contact number should be on your outpatient letter. If you cannot reach them outside working hours, go to the emergency department and tell the team there that you are on sunitinib — this helps them prioritise the right checks.
Can I take painkillers or cold remedies alongside sunitinib?
Some common medicines interact with sunitinib or need to be used with caution. Anti-inflammatory painkillers such as ibuprofen can affect kidney function and blood pressure, both of which are already being monitored during treatment. Paracetamol is generally a safer option for pain relief, but check with your team for your specific situation. For any new medicine — prescribed or over the counter — tell your pharmacist or oncology team you are on sunitinib before you take it.
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Common questions
Frequently asked questions
How long will I take sunitinib?
There is no fixed answer, and this is one of the hardest things about starting. Sunitinib is continued for as long as it is working and you are tolerating it. Your oncologist reassesses this after each set of cycles using scan results and blood tests. Some people take it for months, others for longer. Side effects that become difficult to manage can lead to a dose adjustment or a treatment pause — both are routine clinical decisions, not signs of failure.
Is there a generic version of sunitinib available in India?
Yes. Generic sunitinib is available in India under several brand names, including Sunitix. Generics contain the same active ingredient at the same strength and are approved by CDSCO, India's drug regulator. They are significantly less expensive than the original branded Sutent. Ask your oncologist or hospital pharmacist which version is available at your centre and whether anything needs to be discussed if you switch between brands during treatment.
Will sunitinib make me lose my hair?
Significant hair loss is not a typical side effect of sunitinib, and it differs in this way from many chemotherapy regimens. What some people notice is a change in hair colour — sometimes lighter than usual — and a change in texture or growth rate. Some also notice the skin on their palms taking on a slightly yellow or orange tinge. These changes are generally harmless effects of the drug, but mention them to your team so they can confirm the cause and rule out anything that needs checking.
What should I do if I miss a dose?
If you remember the missed dose on the same day, take it as soon as you remember. If it is already the next day, skip the missed dose and continue with your usual schedule — do not take a double dose to make up for it. If you are unsure what to do, call your team or pharmacist before taking anything. Missing the occasional dose is unlikely to undo the treatment's effect, but taking it irregularly without guidance is not advisable.
Can I keep working during sunitinib treatment?
Many people continue working, particularly in less physically demanding roles. Fatigue is the main factor, and it tends to be more noticeable during treatment weeks, with some improvement during the rest period — which gives you some predictability for planning. Some people adjust their hours or workload in the first few cycles while learning how their body responds. Tell your oncologist if keeping work is important to you. They can advise on adjustments and, where needed, provide documentation for your employer.
Can I drink alcohol while taking sunitinib?
There is no absolute prohibition, but alcohol warrants caution. Sunitinib can affect liver function, and regular alcohol use adds additional strain on the liver. It can also worsen fatigue, which is already one of the most common side effects. If your blood tests show liver function changes, your team may advise you to stop alcohol completely. The right answer for your situation depends on your test results and how you are tolerating treatment — ask your oncologist directly rather than making an assumption.