The book by the famous drug addiction specialist Ruslan Nikolaevich Isaev collects, structures and analyzes in detail all the information necessary for those who are faced with drug addiction in a loved one. The author for the first time reveals in detail the modern principles and technology of rehabilitation of drug addicts - the main method of assistance leading to a complete cessation of drug use. Like a guidebook, the book guides the reader through the stages of the disease - from the moment of acquaintance with narcotic substances to the moment of recovery from addiction. The reader can turn to the chapter of the book that corresponds to his life situation. After reading the book, you will learn: what types of narcotic substances are and how they act on the body, why and how people start using drugs, how to communicate with a drug addict, what to do if the addict refuses treatment, how to choose a clinic and rehabilitation center, what is the work of specialists in the treatment of drug addiction.