Hallucinogen Persisting Perception Disorder

Hallucinogen Persisting Perception Disorder (HPPD) is a condition where individuals experience visual disturbances—such as seeing halos, trails, flashes, or distortions—that persist long after using hallucinogenic drugs. These hallucinations can be distressing but are typically not harmful physically. HPPD is thought to result from changes in how the brain processes visual information, and symptoms can last for months or even years. While some people notice these effects immediately after drug use, others might develop them much later. Treatment options include medications and therapies aimed at managing symptoms and improving quality of life.