BACKGROUND: The aim of the study was to shed more light on the incidence and course of clozapine-induced transient white blood count (WBC) disorders. METHOD: In an analysis of our clozapine drug monitoring program, we evaluated the data of 68 patients receiving clozapine for the first time. Incidence rates were calculated by actuarial life table analysis. The potential influence of sex, age, dose, and plasma level was evaluated using discriminant analysis. RESULTS: Two patients developed progressive neutropenia, leading to agranulocytosis in one case. We also found the following transient hematologic dysfunctions: neutropenia (22.0%), eosinophilia (61.7%), and leukocytosis (40.9%). One patient showed chronic leukocytosis. Additionally, minor changes in the number of lymphocytes, monocytes, and basophilic granulocytes were detected in the study population. CONCLUSION: Hematologic side effects are frequently induced by the atypical antipsychotic clozapine. Next to agranulocytosis, a progressive and potentially lethal hematologic adverse effect, most of the WBC disorders are transient and appear to be harmless.
BACKGROUND: The aim of the study was to shed more light on the incidence and course of clozapine-induced transient white blood count (WBC) disorders. METHOD: In an analysis of our clozapine drug monitoring program, we evaluated the data of 68 patients receiving clozapine for the first time. Incidence rates were calculated by actuarial life table analysis. The potential influence of sex, age, dose, and plasma level was evaluated using discriminant analysis. RESULTS: Two patients developed progressive neutropenia, leading to agranulocytosis in one case. We also found the following transient hematologic dysfunctions: neutropenia (22.0%), eosinophilia (61.7%), and leukocytosis (40.9%). One patient showed chronic leukocytosis. Additionally, minor changes in the number of lymphocytes, monocytes, and basophilic granulocytes were detected in the study population. CONCLUSION: Hematologic side effects are frequently induced by the atypical antipsychotic clozapine. Next to agranulocytosis, a progressive and potentially lethal hematologic adverse effect, most of the WBC disorders are transient and appear to be harmless.
Authors: Madeleine S A Tan; Faraz Honarparvar; James R Falconer; Harendra S Parekh; Preeti Pandey; Dan J Siskind Journal: Psychopharmacology (Berl) Date: 2021-01-07 Impact factor: 4.530
Authors: M Hummer; B Sperner-Unterweger; G Kemmler; M Falk; M Kurz; H Oberbauer; W W Fleischhacker Journal: Psychopharmacology (Berl) Date: 1996-03 Impact factor: 4.530
Authors: Michael Berk; Joanna Fitzsimons; Timothy Lambert; Christos Pantelis; Jayashri Kulkarni; David Castle; Elizabeth W Ryan; Sean Jespersen; Pat McGorry; Gregor Berger; Bill Kuluris; Tom Callaly; Seetal Dodd Journal: CNS Drugs Date: 2007 Impact factor: 5.749
Authors: Christina Voulgari; Raphael Giannas; Georgios Paterakis; Anna Kanellou; Nikolaos Anagnostopoulos; Stamata Pagoni Journal: Case Rep Med Date: 2015-02-10