Public Health

Clinical Trial

Clinical Trials is to judge the effectiveness and safety of medicines or medical devices by watching their effects on A group of subjects. Clinical trial researches are conducted by government health agencies that as federal agency, researchers attached with a hospital or university medical program, freelance researchers, or personal industry’s. During this Subjects usually divided into 2 or a lot of teams, as well as an impression cluster in this doesn't receive the experimental treatment, receives a placebo (inactive substance) instead, or receives a tried-and-true medical aid for comparison functions.

This are classified in to five phases:

1. Phase 0
2. Phase 1
3. Phase 2
4. Phase 3
5. Phase 4