Drug development is a complex and lengthy process that involves several stages: 1. Discovery and Preclinical Research: Identifying potential compounds and testing them in the lab and on animals. 2. Clinical Trials: Conducting studies on humans in phases to determine safety, efficacy, and optimal dosages. 3. Regulatory Approval: Submitting data to regulatory authorities for approval before the drug can be marketed. 4. Post-Marketing Surveillance: Monitoring the drug’s performance and safety in the general population.