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  • Drug classification:



    • Drugs which depress the Central Nervous System: they slow down the brain’s activity, causing reactions that may range from a lack of inhibition to coma, in a gradual process of decreasing brain activity. The most important are alcohol, opiates (heroine and morphine), tranquilizers and hypnotics.



    • Drugs which stimulate the Central Nervous System: they speed up the natural rate of brain activity, giving rise to a state of activity that may range from greater problems with sleeping to a state of hyperactivity. The most notable are amphetamines, cocaine, nicotine and caffeine.



    • Drugs which distort the perceptions of the Central Nervous System: they interfere with normal brain activity, giving rise to distortions in perception, hallucinations, etc. The most important are hallucinogenic drugs (LSD), cannabis by-products (hashish and marihuana) and synthetic drugs (ecstasy).



    • Bear in mind that some substances may share the characteristics of the different groups.


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Last update: 02/10/2007