Khat is a naturally occuring stimulant from the Catha Edulis plant, which is a flowering evergreen tree or large shrub which grows in East Africa and Southern Arabia. It can reach heights from 10 feet to 20 feet and its scrawny leaves resemble withered basil.

Khat leaves contain psychoactive ingredients known as cathinone, which is structurally and chemically similar to amphetamine, and cathine, a milder form of cathinone. Fresh leaves contain both ingredients, but if leaves were left unrefrigerated for more than 48 hours, all active substances but cathine would decompose, which is why fresh leaves are preferred. The leaves are chewed and produce a mild euphoria.

Traditionally Khat has been used as a recreational drug and religious drug by natives of Eastern Africa, Arabian Peninsula and throughout the Middle East.

Khat is also known by a number of names, including: Qat, Kat, Chat, Kus-es-Salahin, Mirra, Tohai, Tschat, Catha, Quat, Abyssinian Tea, African Tea, and African Salad.