A substance that affects a person's ability to distinguish reality from the imaginary.

affecting the brain and influencing behavior

an agent (e.g., thorazine) that affects psychic or mental functioning or behavior.

acting on the mind

affecting the mind or mood or other mental processes; "psychoactive drugs"

A drug that affects the mind, emotions, or behavior.

Any medication used to treat psychiatric signs or symptoms.

Describes any medication that treats symptoms related to moods, thinking, attention, and behavior. The medications used to treat bipolar disorder are psychotropic.