Clinical trials
Withdrawn Phase 4 trials in the United States
Search ClinicalTrials.gov registrations by keyword, then narrow by condition, phase, status, country and start year.
588 trials match Source: ClinicalTrials.gov registrations
Trials started per year
By phase, 2000 to 2026.
| Category | Trials |
|---|---|
| 2002 | 1 |
| 2003 | 1 |
| 2004 | 4 |
| 2005 | 13 |
| 2006 | 15 |
| 2007 | 23 |
| 2008 | 25 |
| 2009 | 26 |
| 2010 | 18 |
| 2011 | 17 |
| 2012 | 21 |
| 2013 | 31 |
| 2014 | 27 |
| 2015 | 31 |
| 2016 | 35 |
| 2017 | 35 |
| 2018 | 37 |
| 2019 | 48 |
| 2020 | 30 |
| 2021 | 32 |
| 2022 | 29 |
| 2023 | 25 |
| 2024 | 21 |
| 2025 | 14 |
| 2026 | 10 |
Status
Trials by registry status. Select a bar to filter.
| Category | Trials |
|---|---|
| Withdrawn | 588 |
Top lead sponsors
A sponsor with a page on Pharma Observatory links to it.
| Category | Trials |
|---|---|
| Massachusetts General Hospital | 21 |
| Johns Hopkins University | 13 |
| NYU Langone Health | 12 |
| Weill Medical College of Cornell University | 10 |
| Northwestern University | 9 |
| University of California, San Francisco | 9 |
| Duke University | 8 |
| Mayo Clinic | 8 |
| Stanford University | 8 |
| University of California, Los Angeles | 8 |
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 | 34 |
| Pain | 26 |
| Agnosia | 19 |
| Diabetes Mellitus | 16 |
| Diabetes Mellitus, Type 2 | 13 |
| Heart Failure | 13 |
| Hepatitis C | 12 |
| Hypertension | 11 |
| Coronary Artery Disease | 9 |
| Delirium | 9 |
Trials
Showing 1 to 25 of 588. Each trial links to its page on Pharma Observatory.
488 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.
No changes to these trials in the last 7 days.
Go deeper on Pharma Observatory
Pharma Observatory connects clinical trials, sponsors, sites and investigators in one searchable platform.