Caffeine is the most widely available legal psychoactive stimulant drug. Also known as theine, methyltheobromine and trimethylxanthine, this xanthine alkaloid is not only found in coffee beans, but also in guaranine that is derived from guarana, mateine derived from mate, theine which is found in various teas and the kola nut, which is the base flavor of various Cola soft drinks. It stimulates the central nervous system, where it restores alertness and wards off drowsiness. Caffeine is also know to display certain diuretic properties, is an ergogenic, an atagonist of the adenosine receptors, and a cAMP levels increasing factor. It seems that caffeine helps prevent the onset of Parkinson’s disease and in the long run lowers the possibility of developing a heart disease.