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Withdrawn Phase 1/2 trials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| Withdrawn | 776 |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 1 to 25 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.