Phase 3 Clinical Trials
Phase 3 trials are large-scale studies (1,000-3,000+) that confirm effectiveness, monitor side effects, and compare the treatment to existing options. Success here often leads to FDA approval.
About Phase 3
Phase 3 is the final testing stage before FDA approval. These are the largest and most rigorous trials, comparing the new treatment against current standard treatments or placebo. Results from Phase 3 form the basis of FDA approval applications.
Top Conditions
Top Sponsors
Frequently Asked Questions
Phase 3 is the final testing stage before FDA approval. These are the largest and most rigorous trials, comparing the new treatment against current standard treatments or placebo. Results from Phase 3 form the basis of FDA approval applications.
There are currently 1,064 Phase 3 clinical trials tracked in our database. These trials span multiple conditions and are run by a mix of pharmaceutical companies, academic institutions, and government agencies.
The conditions with the most Phase 3 trials include Migraine (18 trials), Hemophilia A (16 trials), Myasthenia Gravis (15 trials), Influenza (13 trials), Interstitial Lung Disease (11 trials).
To participate in a Phase 3 trial, browse the conditions below to find relevant trials, review the eligibility criteria, and talk to your doctor about whether participation is appropriate for your situation.
Trial data sourced from the ClinicalTrials.gov API. This site does not provide medical advice, always talk to your doctor about clinical trial participation.
Source: ClinicalTrials.gov, 2026.