NIDA for Teens: The Science Behind Drug Abuse for teachers
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For teachers: Background information and classroom activities for use with the Cocaine Student Booklet.

Stimulant drugs such as cocaine, "crack," amphetamines, and caffeine are substances that speed up activity in the brain and spinal cord. This, in turn, can cause the heart to beat faster and blood pressure and metabolism to increase. Stimulants often influence a person to be more talkative and anxious and to experience feelings of exhilaration.