What term describes the overuse or misuse of drugs?

The term that describes the overuse or misuse of drugs is "abuse." Drug abuse refers to the intentional use of substances for non-medical purposes, often resulting in harmful consequences. This behavior typically involves taking larger doses than prescribed, using the drug in ways not intended by a medical professional, or using illegal substances altogether.

Abuse can lead to a range of negative physical, psychological, and social effects, distinguishing it from terms like "dependence" and "addiction," which focus more on the physiological and psychological attachments that develop from repeated drug use. Misuse also refers to the incorrect use of drugs, particularly in terms of medication, but does not necessarily carry the same connotation of intent or the severity of consequences associated with abuse. Therefore, the term "abuse" precisely encapsulates the harmful patterns of drug use in the context given.