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 1 to 25 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.