Relevance of sleep paralysis and hypnic hallucinations to psychiatry.

A 25-year-old black South African woman developed paranoid beliefs and sad, anxious mood after her first episode of sleep paralysis and hypnopompic hallucinations. She had no prior sleep-related events. Reassurance, explanation of the physiological basis, and a short course of low-dose diazepam led to prompt improvement in mood and sleep, with no further paranoid beliefs. No further episodes occurred, and improvement was sustained at 6 months. The case highlights the importance of asking about core experiences like sleep paralysis and hypnic hallucinations when patients present with acute, nocturnal-onset psychopathology, and the need for closer study of sleep-related side-effects of psychotropic medications.

Study at a glance

Abstract

To describe a patient who presented with psychopathology in the wake of sleep paralysis and hypnopompic hallucinations, and to discuss the importance of these phenomena to psychiatric diagnoses. Case report. A 25-year-old black South African woman developed paranoid beliefs and a sad and anxious mood in the wake of her first experience of sleep paralysis and hypnic hallucinations. She had no history of other sleep-related events. Reassurance, explanation of the physiological basis of her experience, and a short course of low-dose diazepam were provided. Her mood and sleep improved promptly and she no longer held paranoid beliefs. She did not experience further episodes of sleep paralysis or hypnic hallucinations and improvement was sustained at 6 months. It pays to probe for the core experiences or events that patients may be explaining by devising "delusions". Acute, nocturnal-onset, first-time psychopathology warrants inquiry for sleep paralysis and hypnic hallucinations. Sleep-related side-effects of psychotropic medications need to be studied more closely.