Clinical trials
Withdrawn Phase 1/2 trials in the United States
Search ClinicalTrials.gov registrations by keyword, then narrow by condition, phase, status, country and start year.
335 trials match Source: ClinicalTrials.gov registrations
Trials started per year
By phase, 2000 to 2026.
| Category | Trials |
|---|---|
| 2000 | 2 |
| 2003 | 3 |
| 2004 | 5 |
| 2005 | 6 |
| 2006 | 3 |
| 2007 | 3 |
| 2008 | 9 |
| 2009 | 6 |
| 2010 | 12 |
| 2011 | 13 |
| 2012 | 10 |
| 2013 | 10 |
| 2014 | 25 |
| 2015 | 19 |
| 2016 | 16 |
| 2017 | 12 |
| 2018 | 19 |
| 2019 | 20 |
| 2020 | 17 |
| 2021 | 25 |
| 2022 | 24 |
| 2023 | 23 |
| 2024 | 15 |
| 2025 | 18 |
| 2026 | 9 |
Status
Trials by registry status. Select a bar to filter.
| Category | Trials |
|---|---|
| Withdrawn | 335 |
Top lead sponsors
A sponsor with a page on Pharma Observatory links to it.
| Category | Trials |
|---|---|
| National Cancer Institute (NCI) | 9 |
| M.D. Anderson Cancer Center | 8 |
| University of Michigan Rogel Cancer Center | 6 |
| University of Texas Southwestern Medical Center | 6 |
| VA Office of Research and Development | 6 |
| Yale University | 6 |
| Johns Hopkins University | 5 |
| National Institute of Allergy and Infectious Diseases (NIAID) | 5 |
| Roswell Park Cancer Institute | 5 |
| Ageless Regenerative Institute | 4 |
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 | 16 |
| Neoplasms | 13 |
| Melanoma | 12 |
| Carcinoma, Non-Small-Cell Lung | 10 |
| Leukemia, Myeloid, Acute | 10 |
| Lymphoma | 9 |
| Multiple Myeloma | 9 |
| Pancreatic Neoplasms | 9 |
| Carcinoma, Hepatocellular | 7 |
| Myelodysplastic Syndromes | 7 |
Trials
Showing 1 to 25 of 335. Each trial links to its page on Pharma Observatory.
235 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.