Medical Oncologist
Multi-kinase inhibitors
How Does Pazopanib Work? — The Multi-Kinase Inhibitor Explained
Pazopanib is an oral tablet that blocks several proteins at once — the signals cancer uses to build a new blood supply. Understanding what it targets can help you feel less uncertain about a treatment you may be taking for months.
Medically reviewed by Dr. T. Raghavender Reddy, Medical Oncologist, MBBS · DM (Medical Oncology) · MD (Radiation Oncology) · Last reviewed August 2026
- Blocks blood vessel signals — Pazopanib targets the proteins that tell tumours to grow a new blood supply.
- Works on several pathways at once — That is what 'multi-kinase' means — blocking multiple signals rather than just one.
- An oral tablet, taken daily — You take it at home once a day, usually on a long-term basis.
- Requires regular monitoring — Blood pressure checks and liver blood tests are routine while you are on it.
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Pazopanib targets proteins called kinases that cancer uses to signal for new blood vessel growth. By blocking several of these at once — including VEGFR and PDGFR — it aims to cut off the tumour's blood supply. Without that supply, the tumour loses a key source of the nutrients it needs to grow.
How does pazopanib stop cancer growing?
Pazopanib targets a family of proteins called kinases — specifically the ones your body normally uses to signal for new blood vessel growth. By blocking several of these at once, it aims to starve the tumour of the blood supply it needs to grow and spread.
Most tumours cannot grow beyond a small size without building new blood vessels to feed themselves. This process is called angiogenesis. Pazopanib is designed to disrupt it by blocking the main receptor proteins — including VEGFR and PDGFR — that switch this process on.
Blocking several receptors together is what makes it a multi-kinase inhibitor. Each receptor is a different switch. Turning off several at once aims to make the treatment harder for the tumour to work around.
What do the terms on your treatment plan mean?
- Kinase
- A protein that acts as a switch inside cells, passing signals that tell a cell to divide, grow or build new structures. Cancer exploits these switches to fuel its own growth.
- VEGFR (vascular endothelial growth factor receptor)
- The protein that receives the signal to grow new blood vessels. Pazopanib blocks three versions of this switch — VEGFR-1, VEGFR-2 and VEGFR-3.
- PDGFR (platelet-derived growth factor receptor)
- A second set of switches involved in blood vessel development and in how some tumour cells grow. Pazopanib blocks these as well.
- Angiogenesis
- The process of forming new blood vessels. Tumours trigger this to feed their own growth. Anti-angiogenic drugs like pazopanib are designed to interrupt it.
- Multi-kinase inhibitor
- A drug that blocks more than one kinase switch at the same time. Pazopanib is described this way because it targets several different receptor proteins at once.
- Tyrosine kinase inhibitor (TKI)
- The broader class of drugs pazopanib belongs to. TKIs block signals inside or on the surface of cells, rather than killing dividing cells the way chemotherapy does.
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How should you take pazopanib each day?
- Take it at roughly the same time each day to keep a steady level in your blood.
- Take it on an empty stomach — at least one hour before eating or two hours after a meal.
- Swallow the tablet whole. Do not crush, break or chew it.
- Avoid grapefruit and grapefruit juice while you are on pazopanib.
- Tell your treating team about every medicine, supplement and herbal remedy you are taking — before you start and if anything changes.
- If you miss a dose, take your usual dose at the next scheduled time. Do not double up to make up for the missed one.
- Do not stop taking pazopanib without speaking to your oncologist first, even if you feel well.
What side effects does pazopanib commonly cause?
Raised blood pressure is expected in a proportion of patients. Your team will check this at each visit and may prescribe medication for it. Do not ignore a persistent headache or a feeling of pressure — call your team the same day.
Diarrhoea is common. Report it if it becomes frequent or difficult to manage, particularly if there is blood alongside it.
Liver enzyme changes show up in blood tests before they cause symptoms. This is one of the reasons your monitoring schedule matters — your team catches changes before they become a problem.
Some people notice their hair colour lightens or develops a white streak. This is a known effect of the drug and does not mean it is harming you.
Fatigue, nausea and reduced appetite are also frequently reported. Your team can suggest practical ways to manage these while you continue treatment.
How does your team know whether pazopanib is working?
Your oncologist will arrange imaging — usually CT scans, and sometimes PET-CT coordinated with a partner imaging centre — at intervals to assess how the tumour is responding.
A response does not have to mean the tumour disappears. Stable disease, where the tumour stops growing, is also a meaningful outcome for a drug in this class. NCCN and ESMO both recognise stable disease as a treatment goal.
Blood tests alongside the scans track liver function, kidney function and blood counts. These tell your team whether the dose is right for you and whether any adjustment is needed.
If you notice a new symptom between appointments, report it. It may be unrelated to treatment, but it is always better to let your team decide that.
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Common questions
Frequently asked questions
Why was I given pazopanib instead of chemotherapy?
Pazopanib works differently from chemotherapy — it cuts off the blood supply the tumour needs to grow rather than targeting rapidly dividing cells directly. For the cancers it is used in, particularly advanced kidney cancer and certain soft tissue sarcomas, NCCN and ESMO guidelines recommend this class of drug because the evidence supporting it is stronger for those specific diagnoses. Your oncologist chose it because of your cancer type, not as a fallback after other options failed.
How long will I need to take pazopanib?
Pazopanib is taken continuously rather than in cycles. Most people take it for as long as it is working and the side effects are manageable. Your oncologist will review the treatment at each scan. There is no fixed duration decided in advance — the aim is to keep the disease stable for as long as possible. If the treatment stops working or side effects become unmanageable, your team will discuss the next step with you.
Does pazopanib cure cancer?
No, and it would be misleading to suggest otherwise. Pazopanib is intended to control the disease — to slow or stop its growth rather than eliminate it. For some people it works for a long time; for others it stops working sooner. We do not yet have a reliable way to predict which group a given person will fall into. What it aims to do is give you more time with better quality of life than the disease would allow without it.
What happens if pazopanib stops working?
If scans show the disease is progressing despite treatment, your oncologist will discuss the options available for your cancer type and stage. Several other treatments exist for advanced kidney cancer and some sarcomas, and clinical trial options may also be available depending on your situation. Being told one treatment has stopped working is not the same as being told nothing else can be done — it is a transition, and your team plans for it.
Can I eat normally while taking pazopanib?
Mostly yes, with two important exceptions. The tablet must be taken on an empty stomach — at least one hour before food or two hours after a meal — because food significantly changes how much of the drug your body absorbs. Grapefruit and grapefruit juice must also be avoided because they interfere with how pazopanib is broken down. Beyond those points there is no strict diet required, though eating smaller and more frequent meals can help with nausea.
Is pazopanib available in India, and does insurance cover it?
Yes. Pazopanib is approved in India by CDSCO and is available through oncology centres. Insurance and government scheme coverage varies considerably between policies and states. Your team's coordinator or a patient navigator can help you check what applies to your specific situation. If cost is a concern, ask your oncologist whether a patient access or assistance programme is available for this medicine — it is a practical question your team hears regularly and can help with.