Clinical trials
Withdrawn trials in the United States
Search ClinicalTrials.gov registrations by keyword, then narrow by condition, phase, status, country and start year.
6,747 trials match Source: ClinicalTrials.gov registrations
Trials started per year
By phase, 2000 to 2026.
| Category | Trials |
|---|---|
| 2000 | 12 |
| 2001 | 11 |
| 2002 | 17 |
| 2003 | 25 |
| 2004 | 40 |
| 2005 | 96 |
| 2006 | 144 |
| 2007 | 178 |
| 2008 | 229 |
| 2009 | 250 |
| 2010 | 246 |
| 2011 | 228 |
| 2012 | 279 |
| 2013 | 303 |
| 2014 | 329 |
| 2015 | 331 |
| 2016 | 359 |
| 2017 | 319 |
| 2018 | 366 |
| 2019 | 410 |
| 2020 | 435 |
| 2021 | 429 |
| 2022 | 381 |
| 2023 | 356 |
| 2024 | 291 |
| 2025 | 283 |
| 2026 | 172 |
Status
Trials by registry status. Select a bar to filter.
| Category | Trials |
|---|---|
| Withdrawn | 6,747 |
Top lead sponsors
A sponsor with a page on Pharma Observatory links to it.
| Category | Trials |
|---|---|
| Stanford University | 119 |
| Massachusetts General Hospital | 118 |
| NYU Langone Health | 118 |
| Johns Hopkins University | 110 |
| Mayo Clinic | 101 |
| University of Minnesota | 88 |
| Duke University | 84 |
| Wake Forest University Health Sciences | 79 |
| University of California, San Francisco | 74 |
| University of Texas Southwestern Medical Center | 74 |
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 |
|---|---|
| Breast Neoplasms | 174 |
| Neoplasms | 154 |
| Obesity | 125 |
| Pain | 112 |
| Prostatic Neoplasms | 106 |
| Diabetes Mellitus | 100 |
| Heart Failure | 96 |
| COVID-19 | 93 |
| Carcinoma, Non-Small-Cell Lung | 82 |
| Diabetes Mellitus, Type 2 | 82 |
Trials
Showing 51 to 75 of 6,747. Each trial links to its page on Pharma Observatory.
6,647 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.