procedures
Clinical Trial
臨床試験 (rinshō shiken)
A clinical trial is a research study conducted on human participants to evaluate the safety and effectiveness of medical interventions such as new drugs, devices, or procedures. Trials are conducted in phases: Phase I tests safety, Phase II tests efficacy, Phase III compares to existing treatments, and Phase IV monitors long-term effects after approval. Participation is voluntary and requires informed consent. The ACA requires most insurance plans to cover routine costs associated with approved clinical trial participation.
ClinicalTrials.gov (maintained by the NIH) is the official US registry of clinical trials and can be searched by condition, location, and eligibility criteria.
In 9 languages
| Language | Term |
|---|---|
| English | Clinical Trial |
| Japanese (日本語) | 臨床試験 |
| Chinese (中文) | 临床试验 |
| Korean (한국어) | 임상시험 |
| Portuguese | Ensaio Clínico |
| Spanish | Ensayo Clínico |
| Filipino | Clinical Trial |
| Thai | การทดลองทางคลินิก |
| Vietnamese | Thử nghiệm lâm sàng |
| Romanization | rinshō shiken |
Learn more in the guide:
Browse US healthcare guides →Last reviewed: September 2026