Pharmaceutical formulation is a fundamental multidisciplinary field within pharmaceutical sciences dedicated to the process of transforming active pharmaceutical ingredients into a final drug product suitable for administration to patients. This research area investigates the physical, chemical, and biological properties of drug substances and excipients, their interactions, and the design and optimization of manufacturing processes to ensure the stability, safety, efficacy, bioavailability, and desired release characteristics of the therapeutic agent. Its significance lies in enabling the practical and effective delivery of medicinal compounds, bridging the gap between drug discovery and clinical application.