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 51 to 75 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
Pharma Observatory connects clinical trials, sponsors, sites and investigators in one searchable platform.