Severe pancytopenia in a patient taking low dose methotrexate and probenecid.

Basin, K S; Escalante, A; Beardmore, T D · J Rheumatol · 1991

case_report · Level V

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Abstract

A patient with rheumatoid arthritis developed life-threatening pancytopenia resulting from low dose oral methotrexate (MTX) toxicity potentiated by probenecid. Clinically significant drug interactions are not frequently cited as risk factors for MTX hematologic toxicity. As low dose MTX is gaining increasing popularity in rheumatologic practice, these potentially serious interactions should be considered.

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