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caffeine (kă-fēn´) (kaf´ēn)   a xanthine compound found in coffee, tea, chocolate, and colas; it is a central nervous system stimulant, diuretic, striated muscle stimulant, and acts on the cardiovascular system. As the base or the citrate salt, it is used as a central nervous system stimulant and as an adjunct in the treatment of neonatal apnea; as the base it is also used in the treatment of vascular headaches and as an adjunct to analgesics.




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