Hallucinogen Persisting Perception Disorder

Hallucinogen Persisting Perception Disorder (HPPD) is a neurological disorder characterized by a continual presence of sensory disturbances, most commonly visual, that are reminiscent of those generated by the use of hallucinogenic substances. This disorder is distinct from and not to be confused with flashbacks due to psychological trauma.

Symptoms

The primary symptom of HPPD is the persistent experience of visual phenomena that are similar to those produced while under the influence of a hallucinogen. These can include halos or auras around objects, trails following moving objects, difficulty distinguishing between colors, and the appearance of visual snow or static. Other symptoms can include derealization, depersonalization, and other forms of altered perception.

Causes

The exact cause of HPPD is not known, but it is believed to be associated with changes in the brain's neurochemistry following the use of hallucinogenic substances. Some research suggests that HPPD may be more likely to occur in individuals with a history of psychiatric disorders, particularly anxiety disorders and depression.

Diagnosis

Diagnosis of HPPD is based on the patient's history and symptoms, as well as the exclusion of other conditions that could cause similar symptoms, such as migraine, epilepsy, or certain psychiatric disorders. There are currently no specific tests for HPPD.

Treatment

Treatment for HPPD is primarily symptomatic, focusing on managing the individual's symptoms and improving their quality of life. This can include psychotherapy, cognitive behavioral therapy, and in some cases, medication. However, there is currently no cure for HPPD.

See also

• Psychedelic drug
• Visual snow
• Derealization
• Depersonalization