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Gamma-Hydroxybutyrate (GHB) inhibits firing of dopaminergic neurons and is thus potentially useful in the treatment of schizophrenia. GHB was administered to 10 schizophrenics concurrently with low-dose fluphenazine in a 6-week double-blind crossover study. No antipsychotic efficacy of GHB was noted. GHB had little if any effect on plasma prolactin levels after a single administration and caused few side effects. Trials with higher doses of GHB may be warranted.
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