Partial improvement in negative schizophrenic symptoms after amphetamine

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Abstract
In stable schizophrenic outpatients with predominantly “defect state” symptomatology amphetamine caused a reduction in negative symptoms that was statistically significant but not complete (i.e. these symptoms remained clinically discernible). The possibility that dopaminergic hypofunction contributes some elements to the schizophrenic defect state is presented, along with some limited data compatible with this concept. These findings are compared to prior studies in recently hospitalized schizophrenic subjects, and discussed with respect to recent theoretical concepts regrding the role of dopamine in schizophrenic psychopathology