Substance abuse can simply be defined as a pattern of harmful use of any substance for mood-altering purposes. “Substances” can include alcohol and other drugs (illegal or not) as well as some substances that are not drugs at all.
“Abuse” can result because you are using a substance in a way that is not intended or recommended, or because you are using more than prescribed.
To be clear, someone can use substances and not be addicted or even have a substance use disorder, as defined in the Diagnostic and Statistical Manual 5 (DSM 5).1
What Is Harmful Use?
Health officials consider substance use as crossing the line into substance abuse if that repeated use causes significant impairment, such as:
Health issues
Disabilities
Failure to meet responsibilities
Impaired control
Risky use
Social issues
In other words, if you drink enough to get hangovers; use enough drugs that you miss work or school; smoke enough marijuana that you have lost friends; or drink or use more than you intended to use, your substance use is probably at the abuse level.
However, the broad range of substance abuse in today’s society is not that simple.