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4 Gateway Drugs (Caffeine, Alcohol, Tobacco, Marijuana) Introduction In this module, you will learn about the substances that are commonly referred to as gateway drugs. This term refers to drugs whose initial use can lead to a person experimenting with drugs that may be more addictive

Calculations are based on economic modeling by Frank Chaloupka, Ph.D., and John Tauras, Ph.D., at the Institute for Health Research and Policy at the University of Illinois at Chicago, Jidong Huang, Ph.D., at Georgia State University, and Michael Pesko, Ph.D., at the University of Missouri.