Topic overview

Start with the big picture

Adulteration may be intentional, such as replacing a crude drug with another material, adding substances to improve its apparent quality, or misrepresenting a lot’s grade. It may also be unintentional, arising from harvesting or processing contaminants, collection mistakes, poor growing or collection conditions, or deterioration during storage. Other concerns include synthetic chemical additions and processing or packaging practices that alter or misrepresent the product. These categories help distinguish the pathways by which a crude drug’s quality is compromised. Evaluation can draw on sensory and macroscopic examination, microscopy, physicochemical measurements, chromatographic and spectroscopic methods, DNA barcoding, and bioassay. The full lesson develops these types and their relevance to detection and regulatory response.