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By Kristin Stephan, Ph.D.
- Phase I trials are typically very small, with only a few participants. The goal of these studies is to establish a safe dosage range, identify side effects, and evaluate efficacy. These studies are often first-in-human, meaning that all previous work was performed in animal models.
- Phase II trials involve a larger group of individuals to further evaluate a drugs’ safety and efficacy.
- Phase III trials involve a large number of participants and aim to evaluate efficacy, safety, and side effects. Typically, the drug or treatment is compared to an already existing therapy.