The reading for Module 12 introduces concepts essential for understanding the misuse of several different types of substances that are loosely connected in nature, but do not fit neatly into a single grouping or into any of our other groupings. The readings for this module include information about marijuana, hallucinogens, inhalants, and anabolic (androgenic) steroids. This online textbook includes content prepared by the book’s author, as well as several readings from the published literature.

Module 12 Reading Objectives

After engaging with these reading materials and learning resources, you should be able to:

• Explain the effects of these substances and how these effects are produced
• Identify trends in data concerning who uses these substances
• Identify additional issues related to each of these substances
• Define several key terms.