The document outlines the sequential process for discovering, developing, and bringing a new drug to market. It describes the pre-clinical phase of testing new drugs on animals for toxicity. It then discusses the clinical trial phases of testing drugs on humans for safety and effectiveness, including Phase III trials. Finally, it explains that drug manufacturers must submit a New Drug Application including data from all development phases for FDA review before the drug can be approved and brought to market. Post-marketing studies are also required to monitor long-term safety and efficacy.