Two Cases of Somnambulism Induced by Quetiapine

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Sir: Somnambulism reflects an impairment in the normalmechanisms of arousal from sleep in which motor behaviorsinitiated during deep, non-rapid eye movement orslow-wave sleep are activated without full consciousness.Somnambulism, a previously unreported side effect of quetiapine,is described in 2 cases. Both cases described hereinvolved individuals with attention-deficit/hyperactivitydisorder (ADHD).