Drug approval is the process by which regulatory agencies, such as the U.S. Food and Drug Administration (FDA), evaluate new medications to ensure they are safe and effective for public use. This process involves several phases, including laboratory research, animal testing, and clinical trials with human participants. Each phase gathers data on the drug's effects, side effects, and overall performance. Once the trials are complete, the drug's manufacturer submits a detailed application to the regulatory agency. The agency reviews the data and may request additional information before granting approval. If approved, the drug can be marketed and prescribed to patients, contributing to advancements in medical treatment.