Pharamaceutical chemistry is the discipline at the intersection of chemistry, especially synthetic organic chemistry, and pharmacology and various other biological specialties, where they are involved with design, chemical synthesis and development for market of pharmaceutical agents, or bio-active molecules (drugs).

Practically speaking, it involves chemical aspects of identification, and then systematic, thorough synthetic alteration of new chemical entities to make them suitable for therapeutic use. Pharamaceutical chemistry is focused on quality aspects of medicines and aims to assure fitness for purpose of medicinal products by analyzing & evaluating them as per the quality control standards.