Pharmaceutical development is the process of creating new medications to treat diseases and improve health. It involves several stages, including discovery, preclinical testing, and clinical trials. During discovery, researchers identify potential drug candidates, while preclinical testing assesses their safety and effectiveness in laboratory settings. Once a drug passes preclinical tests, it enters clinical trials, which involve testing on human volunteers. These trials are conducted in phases to evaluate the drug's safety, dosage, and efficacy. If successful, the drug can be submitted for approval to regulatory agencies like the U.S. Food and Drug Administration (FDA) before it becomes available to the public.