Hallucinogen-persisting perception disorder (HPPD) causes a person to keep reliving the visual element of an experience caused by hallucinogenic drugs. A person with HPPD has frequent visual ...

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HPPD is a psychiatric disorder characterized by the persisting presence of sensory disturbances, most commonly visual, that resemble those produced by the use of hallucinogenic substances. Ehave ...

It's a condition described as a living hell by sufferers, and it's marked by stigma and shame. WARNING: This story discusses suicide and drug use and may be distressing for some readers. Sheree da ...

With psychedelic drug treatments accelerating towards approval in the US and elsewhere, Ed Prideaux investigates a disconcerting after-effect that is poorly understood. I looked down at the driveway ...

Hallucinogen persisting perception disorder (HPPD) is a rare medical condition that can cause visual disturbances (sometimes called flashbacks) if you’ve taken hallucinogenic drugs in the past. With ...

Hallucinogen Persisting Perception Disorder (HPPD) is a cognitive disorder in which individuals continuously re-experience visual and other sensory hallucinations that they first experienced while ...