This document defines and describes different types of drugs obtained from plants, including organized and unorganized drugs. It discusses rhizomes, roots, resins, alkaloids, and glycosides that are used as drugs. It then focuses on describing resins, including their physical and chemical properties, distribution in plants, occurrence in secretory structures, and classification based on constituents. Finally, it describes the main chemical components of resins - resin acids, resin alcohols including resinotannols and resinols, and resenes.