- Alprazolam (Xanax), amiodarone (Cordarone), astemizole (Hismanal), bepridil (Vascor), bupropion (Wellbutrin, Zyban), cisapride (Propulsid), clorazepate (Tranxene), clozapine (Clozaril), diazepam (Valium), encainide (Enkaid), ergot alkaloids or drugs containing derivatives of ergot alkaloids, estazolam (ProSom), flecainide (Tambocor), flurazepam (Dalmane), itraconazole (Sporanox), ketoconazole (Nizoral), meperidine (Demerol), midazolam (Versed), piroxicam (Feldene), propafenone (Rythmol), propoxyphene (Darvon, Darvocet), quinidine, rifabutin (Mycobutin), rifampin (Rifadin, Rifamate, Rifater, Rimactane), terfenadine (Seldane), triazolam (Halcion), or zolpidem (Ambien). [AS PER AMENDMENT 2/16/99: Agents excluded within 14 days prior to entry are now as follows: