Two-Year Follow-Up of a Patient With Successful Continuation of Clozapine Treatment Despite Morning Pseudoneutropenia
J Clin Psychiatry 2004;65(9):1281[letter]
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Sir: Agranulocytosis occurs in 1% to 2% of patients treated with clozapine. Thus, if neutropenia (absolute neutrophil count [ANC] of < 1500/µL) occurs during clozapine treatment, physicians generally interrupt the drug treatment and do not reintroduce it. Lithium and granulocyte colony-stimulating factor may be used to reverse clozapine-induced granulocytopenia.1 We have previously reported the case of a patient who was able to continue clozapine treatment despite developing “morning pseudoneutropenia” (MPN).2