The use of legal and illicit drugs is widespread in Australia, however for a significant number of people, substance use can lead to addiction, also known as dependence. Many people become dependent on a drug, and they feel that they cannot function without it. They may spend a lot of their time and energy finding and using the drug. They may also need to take increasing amounts to get the same effects, and experience withdrawal symptoms when they stop using it. Addiction is a physical and/or psychological need to use a substance; some substances are more addictive than others, and some users are more likely to become addicted to a substance depending on mental, physical and lifestyle factors. This book examines the extent of tobacco, alcohol and illicit drug abuse in Australia. The book also explores the facts about substance addiction, including how to identify signs of dependency and respond to the negative effects of addiction. What kind of help is available to young people dealing with drug and alcohol dependence? Also includes: Worksheets and activities ; Fast facts ; Glossary ; Web links ; Index.