Warfarin, erythromycin, rifabutin, insulin, carbamazepine, phenobarb, amphotericin, ketoconazole, hydralazine, ritonavir, bendrofluazide, contraceptives, hormonal replacements, digoxin, methotrexate, aminoglutethimide, ciclosporin, INH, quetiapine, anesth, mifepristone, somatropin, bambuterol, salbutamol, salmeterol, theophylline, carbenoxolone, medicines containing liquorice.