Abstract
Visual snow syndrome after start of citalopram\u2014novel insights into underlying pathophysiology
Highlights
Dear Sirs, Patients with visual snow (VS) describe tiny flickering dots in the entire visual field often compared with the TV static in case of a badly adjusted analog signal
We present a case of visual snow syndrome (VSS) onset after citalopram intake and discuss this constellation in the light of “Hallucinogen Persisting Perception Disorder” (HPPD) with possible shared receptor mechanisms
There are reports on visual sensations arising years after lysergic acid diethylamide (LSD) abuse triggered by the intake of selective serotonin reuptake inhibitors (SSRI) in patients with former HPPD [7]
Summary
Visual snow syndrome after start of citalopram—novel insights into underlying pathophysiology. Dear Sirs, Patients with visual snow (VS) describe tiny flickering dots in the entire visual field often compared with the TV static in case of a badly adjusted analog signal. It can be episodic with migraine [1], but is debilitating when continuously present. When occurring together with visual (palinopsia, enhanced entoptic phenomena, photophobia, and nyctalopia) and a variety of non-visual symptoms (tinnitus, concentration loss, etc.), one speaks of visual snow syndrome (VSS) [2]. We present a case of VSS onset after citalopram intake and discuss this constellation in the light of “Hallucinogen Persisting Perception Disorder” (HPPD) with possible shared receptor mechanisms
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