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Withdrawn Phase 2 trials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| Withdrawn | 2,686 |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 51 to 75 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.