- Subjects on medications such as antibiotics, amiodarone, antacids or sucralphate, tricyclic antidepressants, antipsychotics, cyclosporine, cisapride, didanosine, erythromycin, fembufeno, gliburide (a sulphonilurea), nitrofurantoin, probenecid, procainamide, quinidine, sotalol, teophylline, warfarin