Abstract
Lithium-associated remission of psychosis has been described in schizophreniform disorders and in psychotic patients with variants of the red blood cell (RBC)/lithium ratio. To determine whether such remissions are the consequence of lithium treatment rather than spontaneous in nature, a double-blind, placebo-controlled study was undertaken in 16 psychotic patients preselected for the variant of RBC/lithium ratio and/or DSM-III schizophreniform diagnosis. Essentially full and sustained remission of psychosis began during periods of lithium treatment in 4 of 15 of the study patients. Improvement was significantly greater during lithium treatment periods than in counterbalanced placebo treatment conditions in these four subjects ( p<0.02). Fifteen of the same 16 study patients failed to initiate sustained improvement either spontaneously or while on placebo during the initial 14-day treatment period. In this preselected psychotic population, sustained response to lithium occured at a rate at least four times greater than that which could be attributed to spontaneous remission.
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