The atypical antipsychotic clozapine is associated with several well-known abnormalities
of blood cell count, whereas only rare reports are associated with the neuroleptic
risperidone. This report describes lymphocytopenia and thrombocytopenia under treatment
with risperidone which continued after changing to clozapine without other clinically
significant abnormal hematological parameters. Within one week after discontinuation
of both neuroleptics abnormalities of blood cell count reversed to the initial values.
Abnormalities of lymphocytes orthrombocytes are rare side-effects under treatment
with risperidone or clozapine.
