Phase 3 clinical trials are designed to study the efficacy of the investigational therapy in large groups of patients by comparing the therapy to other standard or experimental therapies as well as to monitor adverse effects, and to collect information that will allow the therapy being studied to be used safely.
National Institute on Aging (NIA) Glossary of Clinical Research Terms
U.S. Food and Drug Administration (FDA) The Drug Development Process: Step 3 Clinical Research
NCATS Toolkit for Patient-Focused Therapy Development: Clinical Trials
NCATS Toolkit for Patient-Focused Therapy Development: Educating Your Disease Community