Addressing clozapine under-prescribing and barriers to initiation

a psychiatrist, advanced practice provider, and trainee survey

Abstract

Clozapine use has declined, despite its superior antipsychotic efficacy in treatment-resistant schizophrenia. Implications for clozapine underutilization include suboptimal treatment outcomes and increased hospitalizations. Many barriers preventing the use of clozapine have been described in the literature, including suboptimal knowledge and poor perceptions. The aim of this study was to assess psychiatry prescribers’ perception and knowledge of clozapine. A survey was distributed to advanced practice providers, psychiatrists, and trainees (i.e. residents and fellows) at 10 medical centers within the US and Canada. The survey asked respondents about their perception of clozapine use and assessed their pharmacotherapeutic knowledge of clozapine. Two hundred eleven individual submitted completed surveys of a possible 1152; a response rate of 18.3%. There were no statistically significant differences between the advanced practice provider plus psychiatrist groups and the trainee group for most perception (eight of nine) and knowledge (eight of nine) questions. The knowledge questions with the lowest scores pertained to clozapine reinitiation and myocarditis. The majority of all respondents (144, 68.2%) felt that clozapine prescribing was a burden. Findings of this study support the need for continued clozapine education regardless of a prescriber’s age/experience. Future studies to assess barriers to clozapine prescribing should extend beyond academic centers.