Caffeine is the most popular and widely used drug in the world. It is a substance found in the leaves, seeds or fruit of a number of plant species, such as coffee and tea plants. Caffeine is a stimulant which acts on the central nervous system to speed up the messages to and from the brain. It is made up of the elements carbon, hydrogen, nitrogen and oxygen (C 8 H 10 N 4 O 2 ). Its chemical name is 3,7-dihydro-1,3,7-trimethyl-1H-purine-2,6-dione (or 1,3,7-trimethylxanthyine for short). Reference Link: http://www.druginfo.adf.org.au/article.asp?ContentID=caffeine

Hello Caffeine (sometimes called guaranine when found in guarana, mateine when found in mate, and theine when found in tea) is a xanthine alkaloid found in the leaves and beans of the coffee tree, in tea, yerba mate, guarana berries, and in small quantities in cocoa, the kola nut and the Yaupon holly. In plants, caffeine acts as a natural pesticide that paralyses and kills many insects feeding upon them. The name is derived apparently from Italian caffè ("coffee") plus the alkaloid suffix -ine. Caffeine is a central nervous system (CNS) stimulant, having the effect of warding off drowsiness and restoring alertness. Beverages containing caffeine â?? such as coffee, tea, soda and energy drinks â?? enjoy popularity great enough to make caffeine the world's most popular psychoactive drug. In nature, caffeine is found with widely varying concentrations of the other xanthine alkaloids theophylline and theobromine, which are cardiac stimulants. When caffeine appears to have different effects depending on the source, it is due primarily to varying concentrations of other stimulants and absorption rates of the mixture. http://en.wikipedia.org/wiki/Caffeine

Probably the most popular psychoactive drug in the world, used daily by more than 90% of adults in North America. It is commonly found in coffee, tea, sodas and energy drinks. Caffeine is present in the leaves and beans of the coffee plant, along with the beans, leaves, and fruit of over 60 other plants. In nature it acts as a pesticide that paralyzes and kills certain insects feeding on the plants. Overdose - Caffeinism: Withdrawal Symptoms — Can possibly include(but not limited to) severe headaches, extreme irritability, an inability to concentrate, irregular heart beats, nausea and terrible stomach aches. Doses of over 750 mg (7 cups of coffee) can cause - Previous symptoms along with reactions similar to an anxiety attack, along with delirium, drowsiness, ringing ears, diarrhea, vomiting, light flashes, difficulty breathing, and convulsions(extreme overdose). There are currently four caffeine-induced psychiatric disorders recognized by the Diagnostic and Statistical Manual of Mental Disorders: • Caffeine intoxication • Caffeine-induced anxiety disorder • Caffeine-induced sleep disorder • Caffeine-related disorder(not otherwise specified [NOS]) Effects on memory and learning: "A study showed that caffeine could impair short term memory and increase the likelihood of the tip-of-the-tongue phenomenon." Unlike most other psychoactive substances, caffeine is legal and unregulated in most parts of the world. http://en.wikipedia.org/wiki/Caffeine http://tinyurl.com/86egx Caffeine molecule (under the influence of caffeine.)

Probably the most popular psychoactive drug in the world, used daily by more than 90% of adults in North America. It is commonly found in chocolate, coffee, tea, sodas and energy drinks. Caffeine is present in the leaves and beans of the coffee plant, along with the beans, leaves, and fruit of over 60 other plants. In nature it acts as a pesticide that paralyzes and kills certain insects feeding on the plants. Overdose - Caffeinism: Withdrawal Symptoms — Can possibly include(but not limited to) severe headaches, extreme irritability, an inability to concentrate, irregular heart beats, nausea and terrible stomach aches. Doses of over 750 mg (7 cups of coffee) can cause - Previous symptoms along with reactions similar to an anxiety attack, delirium, drowsiness, ringing ears, diarrhea, vomiting, light flashes, difficulty breathing, and convulsions(extreme overdose). ¤ ¤ There are currently four caffeine-induced psychiatric disorders recognized by the Diagnostic and Statistical Manual of Mental Disorders: • Caffeine intoxication • Caffeine-induced anxiety disorder • Caffeine-induced sleep disorder • Caffeine-related disorder(not otherwise specified [NOS]) Effects on memory and learning: "A study showed that caffeine could impair short term memory and increase the likelihood of the tip-of-the-tongue phenomenon." Unlike most other psychoactive substances, caffeine is legal and unregulated in most parts of the world. http://en.wikipedia.org/wiki/Caffeine http://tinyurl.com/86egx Caffeine molecule (under the influence of caffeine.)

A stimulant