Lesson 1: Clinical Disorders – Part F

Introduction

Substance Disorders
Many Canadians use a variety of drugs each day (e.g., caffeine, acetaminophen, alcohol, nicotine). Some drugs, however, are illegal (e.g., crystal meth, hallucinogens, cocaine). Individuals can experience negative effects from both legal and illegal drugs. Intoxication can result from the first use of a drug and, if the drug is used frequently, substance abuse and dependence may occur. When a person who is dependent on a specific drug is suddenly unable to obtain that drug, withdrawal symptoms may appear.