Journey of a Drug: From Discovery to Regulatory Approval: A Comprehensive Review

Drug discovery and development is a complex, multidisciplinary process that integrates pharmacology, medicinal chemistry, toxicology, bioinformatics, regulatory science, and clinical research to identify, optimize, and evaluate therapeutic agents. The traditional drug development pipeline is lengthy, costly, and associated with high attrition rates. However, significant advancements between 2020 and 2026 have transformed the pharmaceutical landscape through the adoption of artificial intelligence (AI), machine learning, high-throughput screening, computational modeling, and systems biology approaches. These technologies have enhanced target identification, lead optimization, and prediction of drug efficacy and safety, thereby improving the efficiency of drug development.

Recent innovations in precision medicine, genomics, biomarker-driven therapies, and adaptive clinical trial designs have further accelerated the translation of scientific discoveries into clinical applications. Additionally, emerging modalities such as RNA-based therapeutics, gene editing technologies, and advanced drug delivery systems have expanded treatment possibilities for complex diseases. This review provides a comprehensive overview of contemporary trends, technological advancements, regulatory considerations, and future perspectives in drug discovery and development from 2020 to 2026, highlighting their impact on improving therapeutic outcomes and reducing development timelines.