Hello Nithin, Your decision to present your query in this forum is really appreciable. F First of all, you must know that IBS mainly consist of symptoms that arise from the connection between our gut and brain. Since all the tests are giving you normal results, it could probably be due to your stressfull life style, anxiety or depression. You will need a good doctor patient relation to openly discuss your concerns. Psychological causes are one of the main contributor to the symptoms of IBS. The medicine that you are taking, is purely to reduce loose stools. In Homeopathy, there are some very best remedies that will cure this condition, provided you go an expert.