PMID: 26764291Jan 15, 2016Paper

Neutropenia and Agranulocytosis in Chinese Patients Prescribed Clozapine

East Asian Archives of Psychiatry : Official Journal of the Hong Kong College of Psychiatrists = Dong Ya Jing Shen Ke Xue Zhi : Xianggang Jing Shen Ke Yi Xue Yuan Qi Kan
K L Lau, P H W Yim

Abstract

To examine the rate of neutropenia and agranulocytosis, and the pattern of development of these 2 disorders among Chinese patients prescribed clozapine treatment in a local psychiatric unit. Patients who were receiving clozapine when they were under the care of Pamela Youde Nethersole Eastern Hospital Psychiatric Unit, Hong Kong, from 1 January 1997 to 31 December 2012 and who developed neutropenia and agranulocytosis from 1 January 1997 to 30 June 2013 were retrospectively reviewed. A total of 13 patients out of 980 clozapine recipients developed neutropenia and 3 developed agranulocytosis during treatment. Half of them were aged > 50 years and three quarters were female. The majority of patients who developed neutropenia and agranulocytosis were prescribed > 1 psychotropic medication in addition to clozapine. Half of the incidents occurred in the first 18 weeks of clozapine treatment. Long-term monitoring of white cell count is necessary during clozapine treatment. The concurrent use of clozapine with other potentially leukopenic psychotropic drugs should be limited.

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