 - Veteran is taking simvastatin, lovastatin, fentanyl, pimozide, bupropion, nefazodone, dihydroergotamine, ergotamine, quinidine, sirolimus, tacrolimus, or clarithromycin, cyclosporine, St. Johns Wort, diltiazem, verapamil, propranolol, carvedilol or some anticonvulsants phenytoin, phenobarbital, or carbamazepinewithin five half-lives prior to randomization. 