Famous Define Substance Abuse References. Web what is substance abuse? Substance abuse refers to the harmful or hazardous use of psychoactive substances, including alcohol and illicit drugs.
Web substance abuse, also known as drug abuse, is the use of a drug in amounts or by methods that are harmful to the individual or others. Substances such as alcohol, marijuana and nicotine also are considered drugs. Differing definitions of drug abuse are used in public health, medical, and criminal justice contexts.
