Application Note: Rapid Identification And Morphology Evaluation Of Solid Pharmaceutical Excipients

A solid dosage form of a pharmaceutical tablet or capsule often contains a small amount of active drug substance, while the rest of the formulation is inactive ingredients, or "excipients." These excipients have very specific functions, acting as fillers, binders, lubricants, preservatives, solubility enhancers, or antioxidants.