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Described as a living hell by sufferers -- what is HPPD? - ABC News (Australia) [View all]
WARNING: This story discusses suicide and drug use and may be distressing for some viewers.
Hallucinogenic persistent perception disorder, or HPPD, is triggered by the use of psychedelic drugs.
HPPD can result in disturbed vision, where a sufferer may constantly see visual snow, haloes or trails and experience depersonalization or other feelings of isolation or confusion.
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