Phase I-IV Clinical Trials

Clinical trials are research studies that test new medical treatments or drugs in people. They are divided into phases: - **Phase I**: Tests safety and dosage in a small group of healthy volunteers. - **Phase II**: Evaluates effectiveness and side effects in a larger group of people who have the condition. - **Phase III**: Involves thousands of participants to confirm effectiveness and monitor adverse reactions compared to existing treatments. - **Phase IV**: Conducted after a drug is approved to gather more information on its long-term effects and overall effectiveness in the general population.