Clinical trials
Enrolling by invitation trials in the United States
Search ClinicalTrials.gov registrations by keyword, then narrow by condition, phase, status, country and start year.
2,001 trials match Source: ClinicalTrials.gov registrations
Trials started per year
By phase, 2000 to 2026.
| Category | Trials |
|---|---|
| 2001 | 1 |
| 2002 | 4 |
| 2003 | 3 |
| 2004 | 3 |
| 2005 | 2 |
| 2006 | 3 |
| 2007 | 4 |
| 2008 | 8 |
| 2009 | 10 |
| 2010 | 7 |
| 2011 | 8 |
| 2012 | 10 |
| 2013 | 11 |
| 2014 | 14 |
| 2015 | 27 |
| 2016 | 20 |
| 2017 | 29 |
| 2018 | 52 |
| 2019 | 43 |
| 2020 | 67 |
| 2021 | 95 |
| 2022 | 138 |
| 2023 | 198 |
| 2024 | 339 |
| 2025 | 466 |
| 2026 | 425 |
Status
Trials by registry status. Select a bar to filter.
| Category | Trials |
|---|---|
| Enrolling by invitation | 2,001 |
Top lead sponsors
A sponsor with a page on Pharma Observatory links to it.
| Category | Trials |
|---|---|
| Mayo Clinic | 113 |
| Stanford University | 41 |
| University of California, San Francisco | 37 |
| Vanderbilt University Medical Center | 35 |
| Massachusetts General Hospital | 31 |
| University of Pennsylvania | 30 |
| Johns Hopkins University | 25 |
| Indiana University | 24 |
| Northwestern University | 24 |
| University of California, Los Angeles | 23 |
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 |
|---|---|
| Neoplasms | 51 |
| Alzheimer Disease | 41 |
| Parkinson Disease | 37 |
| Heart Failure | 36 |
| Obesity | 36 |
| Diabetes Mellitus, Type 2 | 35 |
| Anxiety Disorders | 34 |
| Cognitive Dysfunction | 34 |
| Diabetes Mellitus | 33 |
| Epilepsy | 31 |
Trials
Showing 26 to 50 of 2,001. Each trial links to its page on Pharma Observatory.
1,901 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.