Clinical trials
Terminated trials in the United States
Search ClinicalTrials.gov registrations by keyword, then narrow by condition, phase, status, country and start year.
20,521 trials match Source: ClinicalTrials.gov registrations
Trials started per year
By phase, 2000 to 2026.
| Category | Trials |
|---|---|
| 2000 | 96 |
| 2001 | 126 |
| 2002 | 189 |
| 2003 | 268 |
| 2004 | 385 |
| 2005 | 548 |
| 2006 | 735 |
| 2007 | 877 |
| 2008 | 925 |
| 2009 | 895 |
| 2010 | 947 |
| 2011 | 909 |
| 2012 | 894 |
| 2013 | 945 |
| 2014 | 1,022 |
| 2015 | 1,005 |
| 2016 | 1,026 |
| 2017 | 1,205 |
| 2018 | 1,299 |
| 2019 | 1,360 |
| 2020 | 1,161 |
| 2021 | 1,234 |
| 2022 | 923 |
| 2023 | 668 |
| 2024 | 390 |
| 2025 | 166 |
| 2026 | 18 |
Status
Trials by registry status. Select a bar to filter.
| Category | Trials |
|---|---|
| Terminated | 20,521 |
Top lead sponsors
A sponsor with a page on Pharma Observatory links to it.
| Category | Trials |
|---|---|
| National Cancer Institute (NCI) | 444 |
| M.D. Anderson Cancer Center | 415 |
| Pfizer | 346 |
| Mayo Clinic | 303 |
| Washington University School of Medicine | 252 |
| Novartis Pharmaceuticals | 237 |
| Massachusetts General Hospital | 206 |
| Duke University | 204 |
| Stanford University | 192 |
| University of California, San Francisco | 184 |
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 | 773 |
| Neoplasms | 714 |
| Carcinoma, Non-Small-Cell Lung | 686 |
| Prostatic Neoplasms | 475 |
| Leukemia, Myeloid, Acute | 430 |
| Melanoma | 400 |
| Multiple Myeloma | 399 |
| Neoplasm Metastasis | 398 |
| Lung Neoplasms | 372 |
| Colorectal Neoplasms | 331 |
Trials
Showing 76 to 100 of 20,521. Each trial links to its page on Pharma Observatory.
20,421 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.