Substance abuse – Wikipedia

Substance abuse, also known as drug abuse, is use of a drug in amounts or by methods which are harmful to the individual or others.It is a form of substance-related disorder.Differing definitions of drug abuse are used in public health, medical and criminal justice contexts. In some cases criminal or anti-social behaviour occurs when the person is under the influence of a drug, and long term …

https://en.wikipedia.org/wiki/Substance_abuse