Ciprofloxacin, MAOIs, OC, warfarin, cyclizine, metoclopramide, domperidone, guanethidine, diuretics, mexiletine, loperamide, kaolin, selegiline, phenytoin, cimetidine, atropine, hyoscine, cisapride, diazepam, hydroxyzine, tranylcypromine, amitriptyline, primidone, rifampicin, colestyramine, muscle relaxants, phenobarb, anaesth, buprenorphine, naltrexone, naloxone.