Module 6: how drugs work: facilitator's guide

Topic 4: How psycho-active drugs act on the body

Page last updated: 2004

Suggested time: 20 minutes


This brief topic provides an overview of the effect of the chemical properties of a drug on the CNS. This process is called pharmacodynamics.

Key issues

4.1 The effect of drugs on the central nervous system (CNS)

Web resources

Close to home website ( describes the biology of drug effects and dependence with easy-to-understand animations of the brain.