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Influence of patient-related variables on clozapine plasma levels

Published Online:https://doi.org/10.1176/ajp.147.11.1471

The authors investigated the clozapine plasma levels of 148 psychiatric inpatients. Multiple regression analysis revealed a linear relationship between dose of clozapine and plasma concentrations. The analysis showed a significant influence of dose, sex, smoking, weight, and age on the plasma concentrations of clozapine under clinical conditions. These results remained significant when clozapine doses below 150 mg/day and above 500 mg/day were excluded from the analysis.

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