What are the symptoms of Hallucinogen Persisting Perception Disorder (HPPD)?
The symptoms of HPPD varies by person but essentially what happens with this disorder is a person will re-experience some or all of the sensory/perception changes that were uniquely induced while under the influence of an hallucinogen. The scientific literature yields several cases of non-hallucinogens doing the same – with reports on marijuana and alcohol causing such disturbances. People with HPPD sometimes report their symptoms worsening when using alcohol or marijuana, as well. But the symptoms of HPPD most commonly are visual – reports of “trails” (eye tracking slows such that an afterimage is perceived such as when you wave your hand before your face) or micropsia/macropsia (seeing things smaller than they are or larger) and/or perceiving images or special thoughts that had occurred while on a hallucinogen. People with HPPD often report photosensitivity -light as a trigger for re-activation of these symptoms. Anxiety is a large component of HPPD – people typically erroneously com
