Which condition can directly result from hallucinogen use?

Hallucinogen Persisting Perception Disorder (HPPD) is a condition that can arise after the use of hallucinogenic substances. Individuals experiencing HPPD have persistent visual disturbances resembling those produced by the hallucinogen, even when not under the influence of the drug. These disturbances can include geometric hallucinations, flashes of color, and trailing effects on moving objects.

The DSM-5-TR outlines HPPD as occurring after the cessation of hallucinogen use, making it a direct consequence of hallucinogen exposure. Unlike weight gain, which is unrelated to hallucinogen use, or generalized anxiety disorder, which does not specifically stem from hallucinogens, HPPD is directly linked to the effects of these drugs on perception. The condition illustrates how the use of hallucinogens can lead to long-lasting changes in sensory perception, thus reinforcing the idea that hallucinogen use can have far-reaching psychological effects even long after the drugs have left the system.