On the way to work you get pulled over for speeding and you don't even have your car. You kill a guy for trying to switch your regular coffee to decaffeinated Folgers. When a Maxwell House commercial comes on, you actually lick the TV screen. You're shaking like Michael Jackson on his wedding night. Caffeine is the most widely consumed psychoactive substance in the world.
Caffeine is classified as a central nervous system stimulant.
It affects heart rate, heart rhythm, blood pressure, circulation, urination, gastric secretions and other physiological functions. It is also a powerful diuretic, causing a loss of water, vitamins and minerals from the body. Its impact on the body varies greatly from individual to individual. In general, at low doses, caffeine produces a sensation of alertness, increased endurance and locomotor activity, and decreased fatigue. Excessive caffeine intake can lead to adverse side effects, including panic attacks.