| Section2 = | Section7 = }}Caffeine is a stimulant drug. It is a xanthine alkaloid compound that acts as a psychoactive stimulant and diuretic in humans. The word comes from the French term for coffee, café. "Caffeine" in The American Heritage Dictionary of the English Language, Fourth Edition, 2000, [LINK: http://www.bartleby.com/61/80/C0018000.html] [2] Caffeine is also called guaranine when found in guarana, mateine when found in mate, and theine when found in tea; all of these names are synonyms for the same chemical compound. Caffeine is found in varying quantities in the beans, leaves, and fruit of over 60 plants, where it acts as a natural pesticide that paralyzes and kills certain insects feeding on the plants. It is most commonly consumed by humans in infusions extracted from the bean of the coffee plant and the leave

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