Clinical trials
Terminated trials in Bulgaria
Search ClinicalTrials.gov registrations by keyword, then narrow by condition, phase, status, country and start year.
352 trials match Source: ClinicalTrials.gov registrations
Trials started per year
By phase, 2000 to 2026.
| Category | Trials |
|---|---|
| 2003 | 2 |
| 2004 | 2 |
| 2005 | 3 |
| 2006 | 6 |
| 2007 | 10 |
| 2008 | 11 |
| 2009 | 11 |
| 2010 | 13 |
| 2011 | 15 |
| 2012 | 12 |
| 2013 | 14 |
| 2014 | 13 |
| 2015 | 19 |
| 2016 | 19 |
| 2017 | 24 |
| 2018 | 38 |
| 2019 | 25 |
| 2020 | 28 |
| 2021 | 30 |
| 2022 | 23 |
| 2023 | 18 |
| 2024 | 14 |
| 2025 | 1 |
Status
Trials by registry status. Select a bar to filter.
| Category | Trials |
|---|---|
| Terminated | 352 |
Top lead sponsors
A sponsor with a page on Pharma Observatory links to it.
| Category | Trials |
|---|---|
| Novartis Pharmaceuticals | 24 |
| AstraZeneca | 18 |
| Pfizer | 18 |
| Amgen | 15 |
| Sanofi | 14 |
| GlaxoSmithKline | 13 |
| Janssen Research & Development, LLC | 13 |
| Hoffmann-La Roche | 8 |
| Otsuka Pharmaceutical Development & Commercialization, Inc. | 7 |
| Takeda | 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 |
|---|---|
| Crohn Disease | 20 |
| Colitis, Ulcerative | 19 |
| Arthritis, Rheumatoid | 14 |
| Schizophrenia | 13 |
| Asthma | 12 |
| Breast Neoplasms | 12 |
| Carcinoma, Non-Small-Cell Lung | 9 |
| Diabetes Mellitus, Type 2 | 9 |
| Heart Failure | 9 |
| Renal Insufficiency, Chronic | 9 |
Trials
Showing 1 to 25 of 352. Each trial links to its page on Pharma Observatory.
252 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
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