ICD-11

Disorders due to use of hallucinogens are characterised by the pattern and consequences of hallucinogen use. Several thousand compounds have hallucinogenic properties, many of which are found in plants (e.g., mescaline) and fungi (e.g., psilocybin) or are chemically synthesized (e.g., lysergic acid diethylamide [LSD]). These compounds have primarily hallucinogenic properties, but some may also be stimulants. Much of the morbidity associated with these compounds arises from the acute effects related to Hallucinogen Intoxication. Hallucinogen Dependence is rare and Hallucinogen Withdrawal is not described. Among the mental disorders related to hallucinogen use, Hallucinogen-Induced Psychotic Disorder is the most frequently seen, although worldwide it is still fairly uncommon.

Hallucinogen-induced delirium is characterised by an acute state of disturbed attention and awareness with specific features of delirium that develops during or soon after substance intoxication or during the use of hallucinogens. The amount and duration of hallucinogen use must be capable of producing delirium. The symptoms are not better explained by a primary mental disorder, by use of or withdrawal from a different substance, or by another health condition that is not classified under Mental, behavioural and neurodevelopmental disorders.