Clinical Trials in Leidschendam, 2026
Every study on the ClinicalTrials.gov registry that lists a site in Netherlands and is open, about to open, active-but-closed, or enrolling by invitation. Filter it, cite it, and take it away as a file.
About this register
This register is built from ClinicalTrials.gov, the trial registry run by the U.S. National Library of Medicine. It includes every study on the registry that lists at least one investigative site in Netherlands and is recruiting, not yet recruiting, active but no longer recruiting, or enrolling by invitation: 3,175 studies in total at the last sync on 13 Nov 2026, 03:17 UTC. The full list can be downloaded as CSV or queried as JSON through the register API.
This page shows the 15 of those studies with a site in Leidschendam.
How many clinical trials are recruiting in Leidschendam?
7 of the 15 studies on this page are recruiting new participants as of the 13 Nov 2026, 03:17 UTC sync. A further 1 have not yet opened recruitment, 7 are active but closed to new participants, and 0 are enrolling by invitation only. Eligibility for any study is decided by its study team.
Summary by phase
| Phase | Studies | Recruiting | Share |
|---|---|---|---|
| Phase 3 | 11 | 5 | 73.3% |
| Not applicable | 2 | 2 | 13.3% |
| Observational | 1 | 0 | 6.7% |
| Phase 2 | 1 | 0 | 6.7% |
Most active sponsors
| Lead sponsor | Studies | Recruiting |
|---|---|---|
| AstraZeneca | 2 | 2 |
| European Organisation for Research and Treatment of Cancer - EORTC | 2 | 1 |
| Haaglanden Medical Centre | 2 | 2 |
| Hoffmann-La Roche | 2 | 1 |
| Aragon Pharmaceuticals, Inc. | 1 | 0 |
| Catharina Ziekenhuis Eindhoven | 1 | 1 |
| Incyte Corporation | 1 | 0 |
| Institut de Recherches Internationales Servier | 1 | 0 |
| Janssen Research & Development, LLC | 1 | 0 |
| Leiden University Medical Center | 1 | 0 |