An adult in the emergency department states,"Everything I see waves.I am outside my body looking at myself.I think I'm losing my mind." Vital signs are slightly elevated.The nurse should suspect:

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The patient who is high on lysergic acid diethylamide (LSD)often experiences synesthesia (visions in sound),depersonalization,and concerns about going "crazy." Synesthesia is not common in schizophrenia.CNS stimulant overdose more commonly involves elevated vital signs and assaultive,grandiose behaviors.Phencyclidine (PCP)use commonly causes bizarre or violent behavior,nystagmus,elevated vital signs,and repetitive jerking movements.

An Adult in the Emergency Department States,"Everything I See Waves