All questions · If we offer you a trial

Will I get a placebo?

In cancer clinical trials you will not usually receive a placebo instead of effective treatment. Most trials compare the current standard treatment with a new treatment, or with the standard treatment plus a new medicine.

If a placebo is used, it has to be explained to you before you agree. Ask your team exactly what the other group receives.

Written by two physicians. Checked against patient information from the US National Cancer Institute and Cancer Research UK.

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Content last updated 25 September 2026 · How we write these cards · Report a problem with this card

These cards are for learning. They are not medical advice and do not replace talking with your own doctor.