Naloxone-induced reversal of schizophrenic hallucinations

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Abstract
In a single-blind pilot study 0.4 mg naloxone i.v. was found temporarily to reduce or abolish auditory hallucinations in four cases of chronic schizophrenia whereas saline was without effect. In one of these patients there was a similar reversal also of her visual hallucinations. Two additional cases who denied hearing voices before the injections, reported no subjective effects.