What are the five main steps of developing a drug?

Author : first copy | Published On : 20 Aug 2026

The new drug development process is a long and carefully planned journey that takes a potential medicine from early research to approval and continued safety monitoring. The main phases of pharmaceutical development include discovery and development, preclinical research, clinical development, regulatory review, and post-market monitoring. During the discovery stage, researchers identify and study promising drug candidates to understand how they may work and select suitable candidates for further development. In preclinical research, the candidate is evaluated through laboratory and nonclinical studies to understand its safety, pharmacology, toxicity, and other important properties before it is tested in humans. The next stage is the clinical development of drug candidates, where clinical trials are conducted in different phases to evaluate safety, dosage, effectiveness, and possible side effects. After enough evidence is collected, the drug is submitted for regulatory review, where the relevant authority assesses its quality, safety, and effectiveness before approval. Even after approval, the drug continues to be monitored for safety and performance in real-world use. These phases of drug development together form the major stages of drug discovery and development and provide a structured drug discovery and development process from an initial idea to an approved medicine. Overall, the drug development process in clinical research helps ensure that a potential medicine is properly evaluated before and after it reaches patients.