4.1 Overview

Have you ever wondered why Tylenol might fix a headache, or caffeine makes you feel more alert?   This chapter will be a deeper exploration of the specific impacts that substances have on the brain and body.  It will help you further your understanding of the brain, the areas that are targeted by certain substances and the chemical reactions when the substances are brought into the body.  You are not expected to be experts in biology; however you should have a basic understanding of the biology and chemistry of substance use.




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