US Medical Term · procedures
Clinical Trial
Ensayo Clínico
In 9 languages
| Language | Term |
|---|---|
| English | Clinical Trial |
| Spanish (Español) | Ensayo Clínico |
| Chinese (中文) | 临床试验 |
| Korean (한국어) | 임상시험 |
| Vietnamese (Tiếng Việt) | Thử nghiệm lâm sàng |
| Filipino (Tagalog) | Clinical Trial |
| Portuguese (Português) | Ensaio Clínico |
| Thai (ภาษาไทย) | การทดลองทางคลินิก |
| Japanese (日本語) | 臨床試験 |
What it means
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.
Related terms
Related guide
→ US Guide: clinical trials and how research studies workSources
Last reviewed: September 2026