This can include medicines, drugs, and alcohol related side-effects. If the symptoms occur during or within 4 weeks of intoxication, then the substance/medication-induced psychotic disorder diagnosis should be considered. 

New Mexico Highlands University

Differential diagnoses to psychotic disorder due to another medical condition include:
- Delirium and Major or Mild Neurocognitive Disorder 
- Substance/Medication-Induced Psychotic Disorder
- Psychotic Disorder

Differential Diagnoses to Psychotic Disorder Due to Another Medical Condition

American Psychiatric Association. (2013). Diagnostic and statistical manual of mental disorders (5th ed., Text revision). https://doi.org/10.1176/appi.books.9780890425596

DSM-5-TR

If the psychosis occurs only during delirium then the diagnosis psychotic disorder due to another medical condition would not be made. If a neurocognitive condition is present and physiologically causes hallucinations and delusions then this diagnosis would be appropriate.

Delirium and Major or Mild Neurocognitive Disorder as Differential Diagnoses to Psychotic Disorder Due to Another Medical Condition

Substance/Medication-Induced Psychotic Disorder as a Differential Diagnosis to Psychotic Disorder Due to Another Medical Condition

If the condition is a psychotic disorder such as schizophrenia or bipolar disorder with psychotic features, then psychotic disorder due to another medical condition cannot be the diagnosis.

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