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Caffeine is the most widely used central nervous system (CNS) stimulant in the world. Whether through coffee, soft drinks, food, or medication, caffeine is ingested habitually by most of the human population. As a stimulant, caffeine causes wakefulness, sustained intellectual activity, and even mood elevation (Hodgman, 1998), making it a popular additive to daily human food and beverage intake. In ... read moreaddition to benefits, however, caffeine has addicting qualities, and thereby causes deleterious effects once consumers go through withdrawal of the drug. This study will further investigate the nature of caffeine dependence through analysis of pain perception once a habitual consumer is in caffeine withdrawal. The analgesic effects of caffeine, although confirmed by numerous studies, are poorly understood. This study will contribute to the knowledge regarding the conditions under which analgesia is experienced upon caffeine consumption.read less
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