Diltiazem does not always increase blood cyclosporin concentration.

  • 1 November 1996
    • journal article
    • Vol. 42  (5) , 642-4
Abstract
The pharmacokinetic interaction between the calcium channel blocking drug, diltiazem (DTZ), the antifungal agent itraconazole (ICZ) and the immunosuppressive drug cyclosporin (CsA) was studied in a patient with a single lung transplant. The CsA area under curve estimations demonstrated a significant increase when ICZ was co-prescribed (5836 micrograms l-1 h vs 8159 micrograms l-1 h) but no increase when DTZ was co-prescribed with CsA (5836 micrograms l-1 h vs 5069 micrograms l-1 h). Despite widespread use as a CsA-sparing agent, DTZ does not always increase CsA concentrations.

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