Types of Chemotherapy Drugs: — The Main Classes Explained
Chemotherapy is not one drug — it is a group of medicines, each working differently inside the cancer cell. The class your oncologist prescribes tells you how it works and what side effects to watch for.
Medically reviewed by Dr. N. Kiranmayee, Medical Oncologist · Last reviewed September 2026
- Six main classes — Each targets cancer cells at a different point in the process of dividing or copying DNA.
- Class shapes side effects — Nerve tingling, heart effects, and kidney effects each belong to specific classes — not all chemotherapy causes them.
- Combinations are deliberate — Most regimens combine two or three classes to attack cancer cells at more than one point.
- Knowing your class helps — It tells you which symptoms to watch for and which questions to ask your oncology team.
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There are six main classes of chemotherapy: alkylating agents, antimetabolites, anthracyclines, taxanes, platinum compounds, and vinca alkaloids. Each class attacks cancer cells in a different way. The class your oncologist chooses determines the combination used, how it is given, and the side effects to expect.
What are the main classes of chemotherapy drugs?
| Class | How it works | Examples you may hear | Key side effects by class |
|---|---|---|---|
| Alkylating agents | Attaches chemical groups directly to DNA, preventing the cell from copying itself. | Cyclophosphamide (Endoxan), Ifosfamide, Chlorambucil | Nausea, hair loss, low blood counts, bladder irritation |
| Antimetabolites | Mimics the raw materials cells need to build DNA, so the wrong building block is incorporated and division fails. | Methotrexate, 5-Fluorouracil (5-FU), Gemcitabine (Gemita), Capecitabine (Xeloda) | Mouth sores, diarrhoea, nausea, low blood counts, hand-foot redness |
| Anthracyclines | Slots into the DNA strand and blocks the enzyme that uncoils it, so the cell cannot read its own instructions. | Doxorubicin (Adriamycin), Epirubicin, Daunorubicin | Heart effects with repeated doses, hair loss, nausea, low blood counts |
| Taxanes | Locks the internal scaffold cells use to pull chromosomes apart, so the cell cannot complete splitting. | Paclitaxel (Intaxel), Docetaxel (Taxotere) | Nerve tingling in hands and feet, fluid retention, hair loss, low blood counts |
| Platinum compounds | Binds two DNA strands together in a way that makes it impossible for the cell to read or copy them. | Cisplatin, Carboplatin, Oxaliplatin | Kidney effects, nerve tingling, nausea, hearing changes (varies by agent) |
| Vinca alkaloids | Disrupts the fibres that physically pull chromosomes to opposite ends of the cell during division. | Vincristine, Vinorelbine, Vinblastine | Nerve effects (numbness, constipation), low blood counts, hair loss |
How does each class find and attack cancer cells?
Each class targets cancer cells at a different stage of cell division — which is why their effects, and their side effects, differ from one another.
Alkylating agents and platinum compounds act directly on the DNA strand. Antimetabolites interfere earlier, when the cell is gathering the materials it needs to copy its DNA. Taxanes and vinca alkaloids act later still, at the moment the cell is physically splitting apart.
All chemotherapy affects rapidly dividing cells. Cancer cells divide far faster than most healthy cells, which is why they bear the greatest impact. It also explains why some healthy tissues — the lining of the mouth and gut, hair follicles, and bone marrow — are touched by the same process.
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Why does knowing your class matter to you personally?
The class you are on determines which side effects are possible and which are not. Nerve tingling belongs mainly to taxanes, platinum compounds, and vinca alkaloids. Heart effects are associated primarily with anthracyclines. Knowing this lets you report the right symptoms rather than wondering whether everything is connected.
It also shapes what your team monitors. On a platinum compound, kidney function and sometimes hearing are checked before each cycle. On an anthracycline, heart function may be assessed across the course of treatment.
Combinations explain why two people with the same cancer can have very different experiences. The regimen — not just the cancer type — determines what you feel.
What should you ask before your chemotherapy starts?
- Which class or classes of chemotherapy are in my regimen?
- What are the specific side effects associated with that class?
- Which side effects are common and manageable, and which need a same-day call?
- Will my kidney, heart, or nerve function be tested during treatment?
- What signs should I watch for at home between cycles?
- If I notice something new, which number should I call?
Did you know?
Most chemotherapy regimens combine drugs from two or three different classes. This is deliberate: cancer cells that develop a way to survive one mechanism of attack are less likely to survive a second type working simultaneously.
NCCN combination guidelines exist for every major cancer type precisely because single-agent resistance is predictable, and planned combinations work around it.
Source: NCCN Clinical Practice Guidelines in Oncology
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Frequently asked questions
What is the difference between chemotherapy and targeted therapy?
Chemotherapy attacks any rapidly dividing cell, which is why it affects some healthy tissues alongside cancer. Targeted therapy is designed to block a specific molecule that cancer cells carry and normal cells usually do not. Whether targeted therapy applies to you depends on biomarker testing of your tumour. Your oncologist will explain which of the two — or a combination — is recommended for your specific diagnosis.
Why do some people on chemotherapy lose hair and others do not?
Hair loss depends on which drug class is in your regimen, not simply on whether it is chemotherapy. Anthracyclines and taxanes are strongly associated with hair loss. Antimetabolites and most platinum compounds cause less hair loss in most people. If your regimen includes a class known for hair loss, your team will tell you before treatment starts and can discuss options such as scalp cooling.
Can drugs from different classes be given in the same session?
Yes. Most regimens combine drugs from different classes, given in the same session or on different days of the same cycle. The schedule is chosen to maximise the effect on cancer cells while giving healthy tissue time to recover between doses. Your oncology nurse will walk you through what happens on each day of your cycle so you know what to expect.
What does nerve tingling from chemotherapy feel like, and does it go away?
The nerve tingling associated with taxanes and some platinum compounds — called peripheral neuropathy — usually starts as numbness, tingling, or pins and needles in the fingers and toes. For some people it fades after treatment ends; for others it takes longer to improve or lingers. Tell your team as soon as you notice it, because the timing and severity matter for how your treatment is managed going forward.
Why does platinum chemotherapy affect the kidneys?
Platinum compounds, especially cisplatin, are filtered through the kidneys and can affect their filtering ability over repeated cycles. This is why kidney function is checked before each dose and why intravenous fluids are usually given alongside treatment to help flush the drug through. Carboplatin and oxaliplatin affect the kidneys less than cisplatin does, which is one reason they are used when kidney protection is a priority.
Is there a class of chemotherapy with fewer side effects?
Every class carries side effects, and which ones matter most depends on your age, your other health conditions, and which organs are most important to protect in your case. There is no universally gentler class — only the class or combination that best balances effectiveness against risk for your specific situation. That is a question your treating oncologist will answer based on your full picture, not on the diagnosis alone.
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