Effect of Clozapine on Time Assigned to Restrictive Housing in a State Prison Population.

This study examined the effect of clozapine on time assigned to restrictive housing (RH; i.e., solitary confinement), disciplinary infractions, and assaults on custody staff among patients treated within the North Carolina prison system. Records were reviewed for patients initiated on clozapine (n = 84) over a 3.5-year period. Fifty-nine patients completed at least three consecutive months of treatment and were included in data analysis. Assigned RH days and disciplinary infractions were assessed for the periods prior to and after treatment with clozapine. Patients accumulated 13,500 RH days pretreatment and 3,560 days postclozapine initiation. There was a significant reduction in RH days with clozapine treatment (P < .05). Patients with personality disorders (n = 36) had a significant decrease in RH days (P < .05), while those with psychotic disorders (n = 23) showed a decrease with borderline significance (P = .051). There were 253 disciplinary infractions pretreatment, including 27 assaults on custody staff, and 118 infractions posttreatment, including 7 assaults; the decrease in infractions was significant in the first three months of treatment (P < .05). The mean ± SD duration of treatment was 269 ± 102 days. Expanding clozapine use in state prisons should be a high priority, as these data are consistent with reports of clozapine's benefits in community settings.