This content is about the misuse and abuse of substances such as drugs and alcohol that are used to change a person’s state of body or mind, for reasons other than a medical need. Substance misuse often leads to addiction, which can be defined as the continuing and compulsive misuse of substances despite physical and/or psychological harm to the user, family or society and includes both legal and illegal substances.   The term ‘substance abuse’ is now often used because of the broad range of substances (including alcohol and inhalants) that are addictive. This content explores Psychological dependence and Physical dependence and at the end of the content you will understand the following:-