The acute management is accomplished quite well in the field through chemical sedation. A patient who is uncontrollably psychotic probably can be most effectively managed in the field through chemical sedation. That, of course, involves both law enforcement and paramedics.
In regard to those with subacute psychosis, the people who are worried or anxious about the effects of the drug they may have consumed, the recent introduction of olanzapine at the pre-hospital level may well help to alleviate their concerns, but that's a relatively smaller proportion of the people we see.