Clinical trials
Withdrawn Phase 2 trials
Search ClinicalTrials.gov registrations by keyword, then narrow by condition, phase, status, country and start year.
2,686 trials match Source: ClinicalTrials.gov registrations
Trials started per year
By phase, 2000 to 2026.
| Category | Trials |
|---|---|
| 2000 | 5 |
| 2001 | 5 |
| 2002 | 10 |
| 2003 | 10 |
| 2004 | 15 |
| 2005 | 21 |
| 2006 | 49 |
| 2007 | 62 |
| 2008 | 89 |
| 2009 | 88 |
| 2010 | 95 |
| 2011 | 81 |
| 2012 | 103 |
| 2013 | 99 |
| 2014 | 116 |
| 2015 | 115 |
| 2016 | 145 |
| 2017 | 108 |
| 2018 | 144 |
| 2019 | 147 |
| 2020 | 181 |
| 2021 | 188 |
| 2022 | 171 |
| 2023 | 155 |
| 2024 | 113 |
| 2025 | 112 |
| 2026 | 76 |
Status
Trials by registry status. Select a bar to filter.
| Category | Trials |
|---|---|
| Withdrawn | 2,686 |
Top lead sponsors
A sponsor with a page on Pharma Observatory links to it.
| Category | Trials |
|---|---|
| M.D. Anderson Cancer Center | 82 |
| National Cancer Institute (NCI) | 42 |
| Washington University School of Medicine | 33 |
| GlaxoSmithKline | 30 |
| Novartis Pharmaceuticals | 30 |
| National Institute of Allergy and Infectious Diseases (NIAID) | 26 |
| Pfizer | 26 |
| Wake Forest University Health Sciences | 26 |
| Massachusetts General Hospital | 24 |
| Sun Yat-sen University | 21 |
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 | 112 |
| Carcinoma, Non-Small-Cell Lung | 103 |
| COVID-19 | 83 |
| Prostatic Neoplasms | 67 |
| Multiple Myeloma | 66 |
| Colorectal Neoplasms | 64 |
| Neoplasm Metastasis | 63 |
| Neoplasms | 59 |
| Lung Neoplasms | 54 |
| Recurrence | 44 |
Trials
Showing 1 to 25 of 2,686. Each trial links to its page on Pharma Observatory.
2,586 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.