96 pages. UK (United Kingdom). Khat is a herbal product consisting of the leaves and shoots of the shrub Catha edulis. It is chewed to obtain a mild stimulant effect and is a less potent stimulant than other commonly used drugs, such as amphetamine or cocaine. This review includes these chapter topics: khat, the pharmacology of khat, medical harms, overview of the societal harms associated with khat use, international issues, education and prevention, treatment of khat use, concerns of communities and groups, and recommendations.