Phase I-IV Trials

Clinical trials are research studies that test new treatments or drugs in people. They are divided into four phases: - **Phase I** focuses on safety, involving a small group of healthy volunteers to see how the drug affects them. - **Phase II** tests the drug’s effectiveness and further assesses its safety in a larger group of patients. - **Phase III** involves an even larger group and compares the new treatment to standard options to determine its overall benefits and risks. - **Phase IV** occurs after approval, monitoring long-term effects and effectiveness as the treatment is used by the general population.