“…After six weeks on between 2 and 12 mg of pimozide, a dopamine antagonist that is rarely used now in routine clinical practice, no significant changes were found in symptoms or functioning, or on the scale used to measure five dimensions of delusional experience. The lack of benefit was in contrast to earlier case studies and non-controlled trials, which suggested that pimozide might be effective in treatment of delusional disorder, erotomanic type (Munro, O'Brien, & Roll, 1985), delusional disorder, jealous type (Byrne & Yatham, 1989;Pollock, 1982), delusional disorder, persecutory type (Ungvari & Hollokoi, 1993), and delusional disorder, somatic type (Riding & Munro, 1975). …”