Antipsychotic-induced paroxysmal perceptual alteration

Paroxysmal perceptual alteration is the brief and recurrent episodes of perceptual alterations that have been reported to occur occasionally with the use of antipsychotics. We report a case of paroxysmal perceptual alteration that occurred with exposure to typical antipsychotics wherein the frequency and duration of occurrence decreased after the substitution of antipsychotic with olanzapine. It seems that patterns on the surfaces are perceived vividly, which is specific of paroxysmal perceptual alteration.