Clinical trials
Phase 4 trials in the United States with unknown status
Search ClinicalTrials.gov registrations by keyword, then narrow by condition, phase, status, country and start year.
555 trials match Source: ClinicalTrials.gov registrations
Trials started per year
By phase, 2000 to 2026.
| Category | Trials |
|---|---|
| 2000 | 1 |
| 2001 | 2 |
| 2002 | 1 |
| 2003 | 2 |
| 2004 | 8 |
| 2005 | 11 |
| 2006 | 18 |
| 2007 | 22 |
| 2008 | 22 |
| 2009 | 27 |
| 2010 | 25 |
| 2011 | 37 |
| 2012 | 14 |
| 2013 | 32 |
| 2014 | 28 |
| 2015 | 31 |
| 2016 | 26 |
| 2017 | 37 |
| 2018 | 35 |
| 2019 | 33 |
| 2020 | 53 |
| 2021 | 37 |
| 2022 | 27 |
| 2023 | 16 |
| 2024 | 7 |
Status
Trials by registry status. Select a bar to filter.
| Category | Trials |
|---|---|
| Unknown status | 555 |
Top lead sponsors
A sponsor with a page on Pharma Observatory links to it.
| Category | Trials |
|---|---|
| University of Cincinnati | 10 |
| University of Southern California | 7 |
| Creighton University | 6 |
| Innovative Medical | 6 |
| Loyola University | 6 |
| Stony Brook University | 6 |
| Augusta University | 5 |
| Brigham and Women's Hospital | 5 |
| Carilion Clinic | 5 |
| Eastern Virginia Medical School | 5 |
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 | 28 |
| Coronary Artery Disease | 13 |
| HIV Infections | 11 |
| Pain | 11 |
| Diabetes Mellitus, Type 2 | 9 |
| Dry Eye Syndromes | 9 |
| Hypertension | 9 |
| Schizophrenia | 9 |
| Major Depressive Disorder | 8 |
| Cardiovascular Diseases | 7 |
Trials
Showing 1 to 25 of 555. Each trial links to its page on Pharma Observatory.
455 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.