Hallucinogen persisting perception disorder: Difference between revisions

'''Hallucinogen persisting perception disorder''' (abbreviated as '''HPPD''') is a psychiatric disorder characterized by the persisting presence of sensory disturbances, most commonly visual, that resemble those that are produced by the use of [[hallucinogenic]] substances. Previous use of hallucinogens is necessary, but not sufficient, for diagnosis of HPPD, and the symptoms cannot be due to another medical condition. HPPD is distinct from flashbacks by reason of its relative permanence and the degree to which it interfere's with one's social and occupational functioning; while flashbacks are transient, condition-specific manifestations of a [[hallucinogenic]] state, HPPD is characterized by its persistence.

According to a 2016 review, there are two types of the condition:<ref>https://link.springer.com/chapter/10.1007/7854_2016_457</ref>