الفهرس 
Introduction
Chapter I: Magnitude of the problemOnly 14 pages are availabe for public view
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Abstract
Adolescence is considered as an important developmental period between childhood and adulthood, which is marked by many physiological and social changes that include, but not limited to, puberty and increased risk-taking and sensation (reward) seeking behaviors. Substance use disorders are characterized by recurrent, mal adaptive use of drugs and/or alcohol which usually leads to significant distress and impairment in social, interpersonal, and occupational functioning. In many cases, substance use disorders are chronic problems that tend to be associated with comorbid mental health conditions. Substance use disorders in adolescents are considered a major societal problem, which predict school dropout and academic underperformance, as they are relatively likely to escalate into more problematic use which may lead to later addiction problems. The public health threat from tobacco and other drugs, especially among adolescents, is a major concern in theworld. A report from the United Nations Office on Drugs and Crime (UNODC) highlighted “the wide-rangingimpact of drugs not only on the health and well-being ofindividuals, but also on the people around them—families and communities . . especially women and children