WebMD examines caffeine and looks at the side effects, both positive and negative, that it can have.
Caffeine is a central nervous system (CNS) stimulant of the methylxanthine class.  It is the world's most widely consumed psychoactive drug, but — unlike many ...
Caffeine facts. Caffeine is a stimulant obtained from over 60 different types of plants worldwide. The scientific name for caffeine is 1,3,7-trimethylxanthine.
Caffeine is a central nervous system stimulant. It works by stimulating the brain. Caffeine is found naturally in foods and beverages such as coffee, tea, colas ...
Caffeine is widely consumed. It is found naturally in the leaves, seeds, and fruits of more than 60 plants, including: Tea leaves; Kola nuts; Coffee
Find out just how much caffeine is in coffee, tea, soda, energy drinks and more.
Find out how much caffeine is in coffee, tea, hot chocolate, cola, energy drinks, yerba mate and more with this guide to caffeine levels in drinks.
Caffeine Definition. Caffeine is a drug that stimulates the central nervous system. Purpose. Caffeine makes people more alert, less drowsy, and improves coordination.
Introduction to How Caffeine Works - Caffeine is one of the most commonly-used drugs -- 90% of Americans use it. Learn why caffeine is America's most popular drug and ...
Find patient medical information for CAFFEINE on WebMD including its uses, effectiveness, side effects and safety, interactions, user ratings and products that have it.