Answer:
Use of medication belonging to someone else.
Step-by-step explanation:
Substance abuse is the term that refers to the indiscriminate use of chemical substances, which many individuals do not need, and which has the capacity to provoke muted reactions of behavior that can be destructive and disturbing.
A person who is going through substance abuse, cannot go without taking some kind of drug, or medication in large substances and in ways that harm his body and even the society where he lives.
An example of substance abuse is a person who takes a medication that was not prescribed for him, but that belongs to someone else, because he cannot control his life.