Understanding diversity will help break down barriers to effective treatment and research of substance dependence. In this textbook, the author defines what is meant by diversity and reviews what we know today about the effects of alcohol, tobacco, marijuana, cocaine and crack, hallucinogens and heroin. This is then put into a broader context by examining the development of policy with particular emphasis on those who were perceived to be the most fervent users of substance. Communities examined include: African Americans; Asian and Pacific Islanders; Hispanic / Latinos; Women; Gay, Lesbian, Bisexual and Transgender. The book concludes with guidelines for the integration of diversity considerations into treatment programs for and research procedures within these communities. This is a useful textbook for classes on substance abuse and will also help the seasoned clinician to break down barriers in the understanding and treatment of substance dependence within specific communities.Loue, Sana is the author of 'Diversity Issues in Substance Abuse Tratment and Research' with ISBN 9780306477751 and ISBN 0306477750.