My IBS-C has recently become IBS-D and I have had several bouts of uncontrollable diarrhoea. I have been seeing a gastroenterologist who has done every possible test all of which have been clear. He told me on Friday he could not help me any more because it was "functional". I do understand what that means! This has triggered a bad bout of diarrhoea. I am taking colpermin and dicycloverine hydrochloride for pain and they work well. Could either of these be causing diarrhoea. I don't find that what I eat affects me. Any advice on how to deal with functional IBS gratefully received.