Substance abuse, also known as drug abuse, is a patterned use of a substance (drug) in which the user consumes the substance in amounts or with methods neither approved nor supervised by medical professionals.
Substance abuse/drug abuse is not limited to mood-altering or psycho-active drugs. If an activity is performed using the objects against the rules and policies of the matter (as in steroids for performance enhancement in sports), it is also called substance abuse.
Therefore, mood-altering and psychoactive substances are not the only types of drug abuse. Using illicit drugs? Narcotics, stimulants, depressants (sedatives), hallucinogens, cannabis, even glues, and paints, are also considered to be classified as drug/substance abuse.