Clinical trials
Withdrawn Phase 1/2 trials
Search ClinicalTrials.gov registrations by keyword, then narrow by condition, phase, status, country and start year.
776 trials match Source: ClinicalTrials.gov registrations
Trials started per year
By phase, 2000 to 2026.
| Category | Trials |
|---|---|
| 2000 | 2 |
| 2002 | 1 |
| 2003 | 3 |
| 2004 | 10 |
| 2005 | 10 |
| 2006 | 9 |
| 2007 | 12 |
| 2008 | 23 |
| 2009 | 19 |
| 2010 | 24 |
| 2011 | 35 |
| 2012 | 22 |
| 2013 | 25 |
| 2014 | 42 |
| 2015 | 46 |
| 2016 | 33 |
| 2017 | 39 |
| 2018 | 40 |
| 2019 | 45 |
| 2020 | 46 |
| 2021 | 59 |
| 2022 | 54 |
| 2023 | 46 |
| 2024 | 38 |
| 2025 | 38 |
| 2026 | 20 |
Status
Trials by registry status. Select a bar to filter.
| Category | Trials |
|---|---|
| Withdrawn | 776 |
Top lead sponsors
A sponsor with a page on Pharma Observatory links to it.
| Category | Trials |
|---|---|
| M.D. Anderson Cancer Center | 28 |
| National Cancer Institute (NCI) | 17 |
| ImmunityBio, Inc. | 13 |
| Fuda Cancer Hospital, Guangzhou | 11 |
| Sadat City University | 10 |
| Yale University | 10 |
| Hadassah Medical Organization | 8 |
| National Institute of Allergy and Infectious Diseases (NIAID) | 8 |
| Massachusetts General Hospital | 7 |
| Novartis Pharmaceuticals | 7 |
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 | 34 |
| Carcinoma, Non-Small-Cell Lung | 29 |
| Leukemia, Myeloid, Acute | 27 |
| Melanoma | 25 |
| COVID-19 | 24 |
| Neoplasms | 22 |
| Lymphoma | 21 |
| Myelodysplastic Syndromes | 19 |
| Pancreatic Neoplasms | 19 |
| Lung Neoplasms | 18 |
Trials
Showing 26 to 50 of 776. Each trial links to its page on Pharma Observatory.
676 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.