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 1 to 25 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.