Clinical trials
Withdrawn trials in the United States
Search ClinicalTrials.gov registrations by keyword, then narrow by condition, phase, status, country and start year.
6,743 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 | 428 |
| 2022 | 381 |
| 2023 | 355 |
| 2024 | 291 |
| 2025 | 281 |
| 2026 | 170 |
Status
Trials by registry status. Select a bar to filter.
| Category | Trials |
|---|---|
| Withdrawn | 6,743 |
Top lead sponsors
A sponsor with a page on Pharma Observatory links to it.
| Category | Trials |
|---|---|
| Stanford University | 120 |
| NYU Langone Health | 118 |
| Massachusetts General Hospital | 117 |
| 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 |
| Diabetes Mellitus, Type 2 | 82 |
| Carcinoma, Non-Small-Cell Lung | 81 |
Trials
Showing 1 to 25 of 6,743. Each trial links to its page on Pharma Observatory.
6,643 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.