정신분열병 환자에서 비정형 항정신병약물과 항콜린성 약물의 병합 사용：예비 연구

Concomitant Use of Anticholinergic Agents with Atypical Antipsychotics in Schizophrenic Patients：A Preliminary Report

  Objective：It is well known that antipsychotic drugs induce extrapyramidal symptoms such as dystonia, akathisia and parkinsonian symptoms even early in the treatment. With the advent of atypical antipsychotic drugs, the incidence of extrapyramidal symptoms has decreased, but danger still exists. Hence, anticholinergic agents are often indicated in treatment of schizophrenia with antipsychotics. Methods：In this observational retrospective study, we examined the use of anticholinergic agents among schizophrenic patients who were initiated on risperidone, olanzapine, or quetiapine, the three most widely prescribed atypical antipsychotics. We reviewed medical records of schizophrenic patients who were initiated on risperidone, olanzapine or quetiapine from January 2004 through December 2004 and continuously treated with the antipsychotics for 6 months. The data were analysed using one way ANOVA, Mann-Whitney U test, chi-square test or Fisher’s exact tests. Results：The study yields two major findings. Firstly, compared with risperidone initiators, there were significantly fewer olanzapine initiators who used anticholinergic agent concomitantly. Secondly, there were significantly fewer olanzapine or quetiapine initiators than risperidone initiators who prescribed anticholinergic agent on the same day when antipsychotics was initiated. Conclusion：As the use of anticholinergic agent is a proxy for the presence of extrapyramidal symptom, these findings suggest that risperidone may be more associated with extrapyramidal symptoms than olanzapine or quetiapine. Controlled studies comparing them to one another should be of particular interest. (Korean J Psychopharmacol 2006;17(2):174-180)