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Questions/Diagnosis & Assessment/Q239 of 246
hardcannabissubstance-induced psychosisTHCdifferential diagnosisschizophrenia prodrome
A 19-year-old male college student is brought to the emergency department by his friends after becoming acutely paranoid and agitated while using a high-potency cannabis concentrate product. His friends report he began accusing them of plotting against him approximately 90 minutes after use and became increasingly disorganized in his speech and behavior. On examination, he is alert and oriented to person only, exhibiting loose associations, referential thinking, and the belief that his thoughts are being broadcast through the room's ventilation system. He has injected conjunctivae, tachycardia of 102 bpm, and an otherwise unremarkable physical examination. His friends report this is the third time in 6 months he has had a similar reaction to cannabis, each time resolving completely within 24-48 hours. Between episodes, he functions well academically, has normal social relationships, and exhibits no psychotic symptoms per his friends and family. He has no family history of psychotic disorders. Urine drug screen is positive only for THC. Which of the following best characterizes this presentation?
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