• Blood Coagul. Fibrinolysis · Dec 2012

    Case Reports

    Drug-induced thrombocytopenia: a less known interaction.

    • Manjari Pandey and Lavanya Yarlagadda.
    • Johns Hopkins University/Sinai Hospital of Baltimore, Baltimore, Maryland 21215, USA. pandey.manjari@gmail.com
    • Blood Coagul. Fibrinolysis. 2012 Dec 1; 23 (8): 778-80.

    AbstractA 57-year-old woman with a left frontal lobe tumor was started on seizure prophylaxis with phenytoin and dexamethasone while awaiting elective surgery for tumor excision. Within a week, she developed a rash all over her body secondary to phenytoin hypersensitivity and her platelet counts decreased progressively to as low as 20,000/μl. Phenytoin was discontinued and she was given intravenous immunoglobulin for 2 days. She had progressive recovery of the platelet count to her baseline over the next 6 days. This case of phenytoin-induced thrombocytopenia emphasizes the importance of recognizing thrombocytopenia secondary to drug use and also highlights a lesser known but important interaction between phenytoin and dexamethasone to enhance this effect. We also provide a brief review of the literature and comment on the pathophysiology of this rare condition.

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