A case note study of antipsychotic prescribing in an inner London hospital showed that although doses of individual drugs were below the British National Formulary limits, polypharmacy occurred in a third of cases. Multiple regression analysis showed high doses were associated with a current risk to the self or others and increasing number of previous admissions in patients with mania and treatment non-responsiveness in schizophrenia.
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Chaplin et al. (1996) studied this question.
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