Increased levels of this chemical in the brain caused by cocaine,narcotics,and alcohol produce the euphoria and excitement ("high") experienced by addicts.

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Dopamine is the chemical in the brain that is associated with the reward system and pleasure. Increased levels of dopamine in the brain due to drug use can produce the euphoria and excitement experienced by addicts. Serotonin is also sometimes involved in regulating mood and emotions, but it is not as directly associated with the effects of drugs like cocaine, narcotics, and alcohol. GABA and epinephrine are not typically associated with the euphoric effects of drug use.

Increased Levels of This Chemical in the Brain Caused by Cocaine,narcotics,and