This book reviews the myriad of elements that layer substance abuse disorder, a significant public health issue. It addresses the strong stigma associated with the disease, particularly in regard to the doctor patient relationships.      The book begins by explaining the importance of integrating psychiatric and substance use disorder treatment by demonstrating the efficacy of this treatment model. Subsequent to this are chapters dedicated to specific addiction disorders, including cocaine, opioids, gambling, food, and sex addictions. Chapters also examine how addiction can differ among various neurobiological, genetic, socioeconomic, and age demographics. The book closes with histories, policies, and modalities of drug use which serve as a key component to building a foundation for effective and ethical health policy.