Clinical trials
Recruiting Phase 4 trials in the United States
Search ClinicalTrials.gov registrations by keyword, then narrow by condition, phase, status, country and start year.
877 trials match Source: ClinicalTrials.gov registrations
Trials started per year
By phase, 2000 to 2026.
| Category | Trials |
|---|---|
| 2000 | 1 |
| 2004 | 1 |
| 2007 | 1 |
| 2010 | 1 |
| 2012 | 1 |
| 2013 | 1 |
| 2014 | 2 |
| 2015 | 1 |
| 2016 | 1 |
| 2017 | 9 |
| 2018 | 16 |
| 2019 | 34 |
| 2020 | 29 |
| 2021 | 36 |
| 2022 | 67 |
| 2023 | 104 |
| 2024 | 145 |
| 2025 | 214 |
| 2026 | 213 |
Status
Trials by registry status. Select a bar to filter.
| Category | Trials |
|---|---|
| Recruiting | 877 |
Top lead sponsors
A sponsor with a page on Pharma Observatory links to it.
| Category | Trials |
|---|---|
| Mayo Clinic | 26 |
| Massachusetts General Hospital | 20 |
| University of California, San Francisco | 19 |
| VA Office of Research and Development | 17 |
| University of Colorado, Denver | 15 |
| Emory University | 14 |
| Brigham and Women's Hospital | 13 |
| Weill Medical College of Cornell University | 12 |
| University of Florida | 11 |
| Duke University | 10 |
Top conditions
MeSH conditions the trials were registered with, not their broader categories. A condition with a page on Pharma Observatory links to it.
| Category | Trials |
|---|---|
| Postoperative Pain | 44 |
| Obesity | 16 |
| Attention Deficit Disorder with Hyperactivity | 14 |
| Dry Eye Syndromes | 14 |
| Opioid-Related Disorders | 13 |
| Pain | 13 |
| Breast Neoplasms | 12 |
| Diabetes Mellitus, Type 2 | 12 |
| Agnosia | 11 |
| Psychotic Disorders | 11 |
Trials
Showing 1 to 25 of 877. Each trial links to its page on Pharma Observatory.
777 more trials match. See them on Pharma Observatory
Recently changed trials
Changes observed in the last 7 days, newest first, site-count changes left out. Source: ClinicalTrials.gov.
Go deeper on Pharma Observatory
Pharma Observatory connects clinical trials, sponsors, sites and investigators in one searchable platform.