This occurs during or after substance use and will result in individuals experiencing vivid hallucinations, misidentifications, delusions, possibly paranoid type behaviours, psychomotor disturbances (excitement or stupor), and an abnormal affect, which may range from intense fear to ecstasy. The effects of this disorder resolve partially within 1 month and fully within 6 months.
(From BearingPoint et al (2013) Substance and drug dependency)
ICD-10 (Mental and behavioural disorders due to psychoactive substance use; F10-F19) describes a psychotic disorder as a cluster of psychotic phenomena that occur during or following psychoactive substance use but that are not explained on the basis of acute intoxication alone and do not form part of a withdrawal state. The disorder is characterized by hallucinations (typically auditory, but often in more than one sensory modality), perceptual distortions, delusions (often of a paranoid or persecutory nature), psychomotor disturbances (excitement or stupor), and an abnormal affect, which may range from intense fear to ecstasy. The sensorium is usually clear but some degree of clouding of consciousness, though not severe confusion, may be present.
• psychosis NOS
Residual and late-onset psychotic disorder:
A disorder in which alcohol- or psychoactive substance-induced changes of cognition, affect, personality, or behaviour persist beyond the period during which a direct psychoactive substance-related effect might reasonably be assumed to be operating. Onset of the disorder should be directly related to the use of the psychoactive substance. Cases in which initial onset of the state occurs later than episode(s) of such substance use should be coded here only where clear and strong evidence is available to attribute the state to the residual effect of the psychoactive substance. Flashbacks may be distinguished from psychotic state partly by their episodic nature, frequently of very short duration, and by their duplication of previous alcohol- or other psychoactive substance-related experiences.
o Alcoholic dementia NOS
o Chronic alcoholic brain syndrome
o Dementia and other milder forms of persisting impairment of cognitive functions
o Late-onset psychoactive substance-induced psychotic disorder
o Post-hallucinogen perception disorder
• affective disorder
• disorder of personality and behaviour
alcohol- or psychoactive substance-induced:
• Korsakov syndrome (F10-F19 with common fourth character .6)
• psychotic state (F10-F19 with common fourth character .5)