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stimulant
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Pile of off-white, irregularly shaped crack cocaine rocks on a flat surface, with a ruler above for scale.
How Does Caffeine Affect the Human Body and Brain?
World map illustrating the illicit international flow of cocaine, with arrows indicating major trafficking routes from the Andean countries of South America to North America, Europe, Africa, Asia, and Oceania. Arrow thickness represents flow rate, with the highest volumes directed toward North America and Europe.
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How Does Caffeine Affect the Human Body and Brain?
Learn about caffeine's effects on the human body.
Video: © American Chemical Society (A Britannica Publishing Partner)

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Crack cocaine
Smokable cocaine, or crack cocaine, is similar to other forms of cocaine in that...
Drug Enforcement Agency (DEA)
Illicit international flow of cocaine
Major trafficking routes of cocaine extend from the Andean countries of South America...
Encyclopædia Britannica, Inc.
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