Addiction
Addiction is a psychological and physical inability to stop consuming a chemical, drug, activity, or substance, even though it is causing mental and physical harm. Addiction does not refer to only dependence on substances such as heroin or cocaine; some addictions also involve an inability to stop partaking in activities, such as gambling, eating, or working.
In those circumstances, a person has a behavioural addiction. A person who cannot stop taking a particular drug or chemical has a substance dependence. Examples of drug and behavioural addictions include alcoholism, marijuana addiction, amphetamine addiction, cocaine addiction, nicotine addiction, opioid addiction, food addiction, chocolate addiction, video game addiction, gambling addiction, and sexual addiction.