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Hallucinogen persisting perception disorder (HPPD) is a non-psychotic disorder in which a person experiences apparent lasting or persistent visual hallucinations or perceptual distortions after using drugs, [1] including but not limited to psychedelics, dissociatives, entactogens, tetrahydrocannabinol (THC), and SSRIs.
Illusory palinopsia is often worse with high stimulus intensity and contrast ratio in a dark adapted state.Multiple types of illusory palinopsia often co-exist in a patient and occur with other diffuse, persistent illusory symptoms such as halos around objects, dysmetropsia (micropsia, macropsia, pelopsia, or teleopsia), Alice in Wonderland Syndrome, visual snow, and oscillopsia.
It is difficult to resolve visual snow with treatment, but it is possible to reduce symptoms and improve quality of life through treatment, both of the syndrome and its comorbidities. [4] In some studies, lamotrigine as a treatment for visual snow syndrome only showed efficacy in 20% of patients, and in one study, patients using lamotrigine ...
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'I used to be able to go and do pretty much everything, but now even a 40-hour work week is very difficult to accomplish.' Andrew Larcher, 26, first developed symptoms of stiff-person syndrome in ...
Closed-eye hallucinations and closed-eye visualizations (CEV) are hallucinations that occur when one's eyes are closed or when one is in a darkened room. They should not be confused with phosphenes, perceived light and shapes when pressure is applied to the eye's retina, or some other non-visual external cause stimulates the eye.
“The stress from shoveling snow combined with the bitter cold can be dangerous, causing an increase in blood flow and blood pressure,” explains Dr. Patrick Kee, MD, Ph.D., a medical director ...
A minimum partition coefficient of 1.40 has been proposed for hallucinogenic effects in vivo and an optimal value of 3.14 has been suggested. [12] In any case, bufotenin does still appear to show significant central permeability and capacity for psychoactive effects. [12] [13] [1]