Overall, these finding suggest that in a naturalistic emergency department setting, haloperidol monotherapy is less effective--at least in requiring AMI--than olanzapine with or without a benzodiazepine or haloperidol plus a benzodiazepine. Moreover, these later 3 regimens seemed comparable. Prospective studies examining the treatment of real-world agitation, including head-to-head comparisons of the haloperidol-benzodiazepine combination with newer IM antipsychotics, are needed.
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