Clinical trials
Withdrawn Phase 4 trials
Search ClinicalTrials.gov registrations by keyword, then narrow by condition, phase, status, country and start year.
1,343 trials match Source: ClinicalTrials.gov registrations
Trials started per year
By phase, 2000 to 2026.
| Category | Trials |
|---|---|
| 2002 | 3 |
| 2003 | 2 |
| 2004 | 10 |
| 2005 | 22 |
| 2006 | 29 |
| 2007 | 50 |
| 2008 | 66 |
| 2009 | 54 |
| 2010 | 59 |
| 2011 | 45 |
| 2012 | 64 |
| 2013 | 69 |
| 2014 | 65 |
| 2015 | 74 |
| 2016 | 93 |
| 2017 | 83 |
| 2018 | 74 |
| 2019 | 90 |
| 2020 | 84 |
| 2021 | 63 |
| 2022 | 49 |
| 2023 | 50 |
| 2024 | 44 |
| 2025 | 28 |
| 2026 | 23 |
Status
Trials by registry status. Select a bar to filter.
| Category | Trials |
|---|---|
| Withdrawn | 1,343 |
Top lead sponsors
A sponsor with a page on Pharma Observatory links to it.
| Category | Trials |
|---|---|
| Massachusetts General Hospital | 26 |
| Novartis Pharmaceuticals | 20 |
| University of California, San Francisco | 17 |
| Johns Hopkins University | 16 |
| NYU Langone Health | 15 |
| Northwestern University | 13 |
| Mayo Clinic | 12 |
| Brigham and Women's Hospital | 11 |
| Duke University | 11 |
| The University of Texas Health Science Center, Houston | 11 |
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 | 48 |
| Pain | 37 |
| Diabetes Mellitus | 36 |
| Agnosia | 33 |
| Diabetes Mellitus, Type 2 | 30 |
| Hypertension | 27 |
| Pulmonary Disease, Chronic Obstructive | 24 |
| Heart Failure | 20 |
| Hepatitis C | 20 |
| Coronary Artery Disease | 18 |
Trials
Showing 26 to 50 of 1,343. Each trial links to its page on Pharma Observatory.
1,243 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.