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What are the phases of a clinical trial?

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1. Phase I. A new research treatment is given to a small number of participants and emphasizes safety. The researchers determine the best way to give the new treatment, find out the drug’s most frequent and serious side effects, and how much of it can be given safely.

2. Phase II. Determine the effect of a research treatment on the particular disease or condition being evaluated.

3. Phase III. Compare the new treatment with the standard treatment and study different populations and different dosages and combinations of drugs.

4. Phase IV. Apply the new treatment to general patient care (after FDA approval for marketing).

Reviewed by Nayana Ambardekar on October 28, 2017
Reviewed by Nayana Ambardekar on October 28, 2017

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What are the advantages of participating in a clinical trial?

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