Chemotherapy

Treatment using medicines that kill, damage, or inhibit the growth and division of rapidly multiplying cells, particularly cancer cells.

Chemotherapy is most commonly associated with cancer treatment. Depending on the cancer, it may be used to cure the disease, reduce the risk of recurrence, slow its progression, shrink tumors, or relieve symptoms. It may be given alone or combined with surgery, radiation therapy, immunotherapy, targeted therapy, or other treatments.

Because some healthy cells also divide rapidly, chemotherapy can affect them as well. This helps explain side effects such as hair loss, nausea, mouth sores, and reduced blood-cell production, although side effects vary considerably between medicines and treatment regimens.

COMMONLY CONFUSED WITH

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Clinical & Educational Context

Discussed in Health Articles & Guides

Explore how "Chemotherapy" is covered across our evidence-based editorial guides:

3 Articles
Unstraight Lines

Kill Me a Little, Kill It More

Chemotherapy illustrates this challenge: many chemotherapy drugs target rapidly dividing cells, which include cancer cells but may also include healthy cells in tissues such...
The Hard Parts of Medicine

Do You Need Supplements? What Medical Research Says

Some antioxidant supplements and cancer treatment: Certain antioxidant supplements may interfere with some forms of chemotherapy or radiotherapy, depending on the treatment and circumstances.
The Hard Parts of Medicine

Polypharmacy: What Really Happens When You Take Multiple Medicines

Polypharmacy, the use of multiple medicines by one person is becoming increasingly common as people live longer and more people...