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Withdrawn Phase 4 trials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| Withdrawn | 1,343 |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 1 to 25 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.