Clinical Trials in Rio de Janeiro, 2026
Every study on the ClinicalTrials.gov registry that lists a site in Brazil 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 Brazil and is recruiting, not yet recruiting, active but no longer recruiting, or enrolling by invitation: 2,222 studies in total at the last sync on 03 Nov 2026, 03:18 UTC. The full list can be downloaded as CSV or queried as JSON through the register API.
This page shows the 5 of those studies with a site in Rio de Janeiro that also match the filters currently applied.
How many clinical trials are recruiting in Rio de Janeiro?
3 of the 5 studies on this page are recruiting new participants as of the 03 Nov 2026, 03:18 UTC sync. A further 1 have not yet opened recruitment, 1 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 |
|---|---|---|---|
| Not applicable | 5 | 3 | 100% |
Most active sponsors
| Lead sponsor | Studies | Recruiting |
|---|---|---|
| Universidade Federal Fluminense | 5 | 3 |