Caffeine, probably the most widely used drug affects the psychological state of those who consume it. Abuse results in symptoms of caffeinism which include agitation, disorientation and a syndrome which may be mistaken for anxiety/neurosis. It is a habit-forming drug in which tolerance develops. It affects sleep in a dose related manner which is dependent on the daily caffeine intake, i.e., high users have less effect. Its central nervous system stimulation can cause pleasant effects with improved attention and concentration at lower doses. At high doses, the reverse may occur. Used judiciously, it may be a useful therapy in the treatment of hyperkinetic children.
Caffeine is a chemical found in many different plants from all over the world, and it is a stimulant, which means that it speeds up the brain and nervous system.
Caffeine is found in:
- the coffee bean, originally from Arabia
- the tea leaf from China
- the kola nut from West Africa
- the cocoa bean from Mexico
- the ilex plant from Brazil
- the Cassina (or Christmas berry tree) from North America.
* These plants are now grown in many other places in the world. Extracts from these plants are used in many foods and drinks, such as tea, coffee, chocolate and cola-flavoured drinks.
