May increase anticoagulant effect of warfarin. May increase or prolong the effect of the following drugs: Oral hypoglycaemics (e.g. sulfonylureas), phenytoin, HIV protease inhibitors (e.g. saquinavir), antineoplastic agents (e.g. vinca alkaloids, busulfan, docetaxel), Ca channel blockers (e.g. dihydropyridines, verapamil), immunosuppressive agents (e.g. ciclosporin, tacrolimus, sirolimus), carbamazepine, cilostazol, buspirone, disopyramide, alfentanil, sildenafil, alprazolam, brotizolam, midazolam IV, rifabutin, methylprednisolone, trimetrexate, ebastine and reboxetine. Potentially Fatal: Increased risk of cardiac arrhythmia w/ astemizole, cisapride, dofetilide, halofantrine, mizolastine, pimozide, quinidine, sertindole, terfenadine. May increase exposure to ergot alkaloids leading to ergotism. May increase the risk of rhabdomyolysis w/ HMG-CoA reductase inhibitors (e.g. simvastatin and...
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