Chronic drug use, likewise called substance reliance or reliance disorder, is where an individual feels a solid need to take a medication. Fixation likewise includes different practices. These incorporate thinking that its hard to control the need to utilize the medication and feeling the utilization of the medication to be a higher priority than progressively typical things, for example, family or work. When the individual doesn't utilize the medication for a measure of time, they may experience the ill effects of withdrawal. At the point when an individual is dependent, they are typically dependent on a class (a particular sort) of medication. For instance: Heroin is a medication that is in the Opiate class. Which implies that an individual dependent on Heroin may likewise be believed to have a dependence on different sedatives, for example, Morphine? An individual who may effortlessly get dependent on drugs is said to have an addictive character. The Diagnostic and Statistical Manual of Mental Disorders characterizes chronic drug use as a psychological issue. Illicit drug use is frequently connected with other mental issue.