Abstract: Caffeine, one of the world's most popular psychoactive 
substances, is sought for its central nervous system stimulant 
effects. If coffee, tea, and soda alone do not provide the desired 
stimulation, some consumers are turning to the newest fad in the 
caffeine market, energy drinks. These beverages are loaded with 
caffeine and sugar, infused with herbal additives, and marketed 
particularly to youth. Caffeine produces dose-dependent symptoms, and 
intoxication may develop with overconsumption. Caffeine is also 
recognized for its addictive properties, and discontinuation results 
in a withdrawal syndrome.

<http://www.medscape.com/viewarticle/714855>http://www.medscape.com/viewarticle/714855 





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