Clinical trials
Completed Phase 4 trials in the United States
Search ClinicalTrials.gov registrations by keyword, then narrow by condition, phase, status, country and start year.
6,662 trials match Source: ClinicalTrials.gov registrations
Trials started per year
By phase, 2000 to 2026.
| Category | Trials |
|---|---|
| 2000 | 49 |
| 2001 | 78 |
| 2002 | 145 |
| 2003 | 235 |
| 2004 | 280 |
| 2005 | 301 |
| 2006 | 353 |
| 2007 | 325 |
| 2008 | 375 |
| 2009 | 373 |
| 2010 | 347 |
| 2011 | 307 |
| 2012 | 301 |
| 2013 | 300 |
| 2014 | 293 |
| 2015 | 288 |
| 2016 | 310 |
| 2017 | 320 |
| 2018 | 295 |
| 2019 | 291 |
| 2020 | 232 |
| 2021 | 250 |
| 2022 | 166 |
| 2023 | 138 |
| 2024 | 97 |
| 2025 | 37 |
| 2026 | 6 |
Status
Trials by registry status. Select a bar to filter.
| Category | Trials |
|---|---|
| Completed | 6,662 |
Top lead sponsors
A sponsor with a page on Pharma Observatory links to it.
| Category | Trials |
|---|---|
| Massachusetts General Hospital | 124 |
| Mayo Clinic | 109 |
| University of California, San Francisco | 98 |
| GlaxoSmithKline | 97 |
| Emory University | 96 |
| Duke University | 87 |
| Eli Lilly and Company | 82 |
| University of Texas Southwestern Medical Center | 74 |
| Pfizer | 70 |
| University of Florida | 69 |
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 |
|---|---|
| Pain | 219 |
| Diabetes Mellitus, Type 2 | 207 |
| Postoperative Pain | 169 |
| Schizophrenia | 149 |
| Diabetes Mellitus | 147 |
| Major Depressive Disorder | 138 |
| Hypertension | 129 |
| Obesity | 125 |
| HIV Infections | 123 |
| Bipolar Disorder | 120 |
Trials
Showing 1 to 25 of 6,662. Each trial links to its page on Pharma Observatory.
6,562 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.