An assessment for an underlying cause of behavior is needed before prescribing antipsychotic medication for symptoms of dementia .  Antipsychotics in old age dementia showed a modest benefit compared to placebo in managing aggression or psychosis, but this is combined with a fairly large increase in serious adverse events. Thus, antipsychotics should not be used routinely to treat dementia with aggression or psychosis, but may be an option in a few cases where there is severe distress or risk of physical harm to others.  Psychosocial interventions may reduce the need for antipsychotics. 
STAGE 5. Prescribe Clozaril in combination with another antipsychotic, or Clozaril in combination with electroshock .   The manual says, "Almost all studies have shown beneficial effects of ECT for persistent psychotic states."   The manual also says, "There are no controlled studies of ECT for schizophrenia in which number of treatments, duration of treatments, and electrode placement have been systematically evaluated."   Therefore, if you're going to use electroconvulsive therapy on the patient, be sure to use it at least ten times, on both sides of the brain.  If this proves unsuccessful, go to the next stage.
processing.... Drugs & Diseases haloperidol (Rx) Brand and Other Names: Haldol, Haldol Decanoate, more... Haloperidol LA, Peridol