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NIDA

The Brain & the Actions of Cocaine, Opiates, and Marijuana

3D Illustration of the Human Brain

The first in a 5-part series, offers an understanding of the brain, how the reward center works, and what happens in the brain when a person uses cocaine, opiates (heroine), or marijuana.

Revised: January 2007
Author: National Institute on Drug Abuse

This page was last updated January 2007