Command hallucination risk screen
A person tells you a voice is instructing him to hit another patient. This is a formal risk assessment, not a checkbox. Tick what is true and watch what moves.
Lower risk of actingHigher risk of acting
Before anyone writes “first-episode psychosis”
| Delirium | Psychosis in schizophrenia |
| Onset | Acute, over hours to days | Prodrome over months |
| Course | Fluctuates across the day, worse at night | Relatively stable through the day |
| Attention | Impaired — cannot hold a thread | Usually intact between episodes |
| Orientation | Impaired | Usually oriented |
| Hallucinations | Often visual | Usually auditory |
Much of the rule-out is nursing work: vital signs including temperature, a fingerstick glucose, a neurological check, a review of every prescribed and non-prescribed substance, and an accurate collateral history. Other mimics: stimulant, cannabis or hallucinogen intoxication; alcohol or sedative withdrawal; steroid or anticholinergic effect; thyroid disease; B12 deficiency; neurosyphilis and HIV; temporal lobe epilepsy; autoimmune encephalitis; lupus; Wilson’s and Huntington’s disease; space-occupying lesions.
Water intoxication. Primary polydipsia is common in chronic psychotic illness and can produce dilutional hyponatremia, confusion, seizures and death. Daily weights are the cheapest detection tool you have — a rise of more than three to four percent of body weight across a day, with new confusion, incontinence or vomiting, is a sodium check now, not at the next scheduled draw.