Khat (Catha edulis forsk) is a flowering plant native totropical East Africa and the Arabian Peninsula, which contains the alkaloidcalled cathinone. Cathinone is a psycho-stimulant with an amphetamine-like chemical structure.The earliest known documented description of khat is reportedin the Kitab al-Saidala fi al-Tibb an 11th century work on pharmacy and materia medica written by Ab Rayh n al-B r n , a Persian scientist and biologist.The first scientific description of khat as Catha edulis wasin the Flora Aegyptiaco Arabica written by the Swedish botanist Peter Forskal.In 1980, the World...