Clinical trials
Terminated Observational trials
Search ClinicalTrials.gov registrations by keyword, then narrow by condition, phase, status, country and start year.
4,549 trials match Source: ClinicalTrials.gov registrations
Trials started per year
By phase, 2000 to 2026.
| Category | Trials |
|---|---|
| 2000 | 12 |
| 2001 | 24 |
| 2002 | 39 |
| 2003 | 45 |
| 2004 | 78 |
| 2005 | 107 |
| 2006 | 121 |
| 2007 | 160 |
| 2008 | 169 |
| 2009 | 191 |
| 2010 | 236 |
| 2011 | 232 |
| 2012 | 229 |
| 2013 | 220 |
| 2014 | 245 |
| 2015 | 252 |
| 2016 | 248 |
| 2017 | 267 |
| 2018 | 270 |
| 2019 | 307 |
| 2020 | 251 |
| 2021 | 265 |
| 2022 | 187 |
| 2023 | 159 |
| 2024 | 99 |
| 2025 | 35 |
| 2026 | 12 |
Status
Trials by registry status. Select a bar to filter.
| Category | Trials |
|---|---|
| Terminated | 4,549 |
Top lead sponsors
A sponsor with a page on Pharma Observatory links to it.
| Category | Trials |
|---|---|
| Mayo Clinic | 51 |
| Stanford University | 50 |
| Children's Healthcare of Atlanta | 49 |
| Pfizer | 44 |
| National Institute of Allergy and Infectious Diseases (NIAID) | 42 |
| AstraZeneca | 39 |
| Assistance Publique - Hôpitaux de Paris | 38 |
| M.D. Anderson Cancer Center | 32 |
| National Cancer Institute (NCI) | 32 |
| Emory University | 31 |
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 | 139 |
| Neoplasms | 137 |
| COVID-19 | 73 |
| Heart Failure | 73 |
| Lung Neoplasms | 68 |
| Prostatic Neoplasms | 68 |
| Coronary Artery Disease | 64 |
| Obesity | 64 |
| Arthritis, Rheumatoid | 60 |
| Carcinoma, Non-Small-Cell Lung | 59 |
Trials
Showing 26 to 50 of 4,549. Each trial links to its page on Pharma Observatory.
4,449 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.