The use of psychoactive drugs for months or years in ways that harm the user or others is best described as which option?

• A. A transient, non-harmful experiment with substances.
• B. A mood disorder unrelated to substance use.
• C. A brain injury resulting from trauma.
• D. The use of psychoactive drugs for months or years in ways that harm the user or others.

Answer: (D)

Chronic, harmful use of psychoactive drugs signals a substance use disorder, often called addiction. This means the person continues using despite negative effects on health, safety, or relationships, and typically involves patterns such as craving, tolerance, withdrawal, and impairment in functioning. The description given precisely captures this ongoing, self-defeating behavior that harms the user or others.

The other options don’t fit because a brief, non-harmful experiment isn’t ongoing or damaging; a mood disorder unrelated to substances isn’t caused by or explained by drug use; and a brain injury from trauma is a physical injury, not a pattern of substance misuse.