Artificial intelligence (AI) is fundamentally redefining the scientific foundations of drug discovery by introducing unprecedented levels of speed, precision, scalability, and cost-efficiency across the entire pharmaceutical pipeline. Unlike traditional trial-and-error approaches, AI-driven systems integrate computational intelligence with biological insight, enabling the rational exploration of vast chemical and biological spaces that far exceed human analytical capacity. Advanced AI algorithms can accurately predict molecular interactions, optimize lead compounds, design novel chemical scaffolds, and identify high-confidence therapeutic targets with remarkable efficiency. These capabilities significantly compress timelines from early discovery to clinical candidate selection, transforming drug development from a sequential, resource-intensive process into a data-driven, adaptive, and globally scalable scientific enterprise. By integrating large-scale chemical librarie...