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Khat (pronounced “cot”) is a stimulant drug derived from a shrub (Catha edulis) that is native to East Africa and southern Arabia. The khat plant itself is not scheduled under the Controlled Substances Act; however, because one of its chemical constituents, cathinone, is a Schedule I drug, the Federal Government considers its use illegal.1

The main psychoactive ingredients in khat are cathine and cathinone, chemicals that are structurally similar to, but less potent than, amphetamine, yet result in similar psychomotor stimulant effects. Chewing khat leaves can induce a state of euphoria and elation as well as feelings of increased alertness and arousal. The user can also experience an increase in blood pressure and heart rate. The effects begin to subside after about 90 minutes to 3 hours, but can last 24 hours. At the end of a khat session, the user may experience a depressive mood, irritability, loss of appetite, and difficulty sleeping.

There are a number of adverse physical effects that have been associated with heavy or long-term use of khat, including tooth decay and periodontal disease; gastrointestinal disorders such as constipation, ulcers, inflammation of the stomach, and increased risk of upper gastrointestinal tumors; and cardiovascular disorders such as irregular heartbeat, decreased blood flow, and myocardial infarction.

It is estimated that as many as 10 million people worldwide chew khat.  It is commonly found in the southwestern part of the Arabian Peninsula and in East Africa, where it has been used for centuries as part of an established cultural tradition. In one large study in Yemen, 82 percent of men and 43 percent of women reported at least one lifetime episode of khat use. Its current use among particular migrant communities in the United States and in Europe has caused alarm among policymakers and health care professionals. No reliable estimates of prevalence in the United States exist.