Which term means to "impersonate insanity" under drug influence?

The term that means to "impersonate insanity" under drug influence is "psychotomimetic." This term specifically refers to substances that induce effects resembling symptoms of psychosis or insanity, typically altering perception, mood, and cognitive function in a way that can mimic the experiences associated with severe mental disturbances.

The focus on the impersonation aspect highlights how certain drugs can produce a state where the user's mental processes become distorted, leading to altered realities similar to those experienced by individuals with psychotic disorders. This characteristic makes psychotomimetic drugs important in the study of both pharmacology and psychology, as they help professionals understand how various substances can impact mental health.

Other terms such as psychoactive, psychotogenic, and psychedelic describe different aspects of drug effects but do not specifically convey the notion of mimicking insanity. Psychoactive refers broadly to any substance that alters mood, perception, or cognitive function. Psychotogenic relates to substances that can lead to the onset of psychotic symptoms but does not encapsulate the impersonation of insanity. Psychedelic describes a class of drugs known for enhancing perception and producing sensory experiences, but again, it does not denote the aspect of imitating mental illness.