Hi. Thanks for your query and an elucidate history. Duspatalin is mebeverine ans is just a medicines used for symptomatic relief of intestinal pain. IF you take this round the clock , it can dilate the bowel and can cause bloating . Another reason for the bloating in abdomen and pain can be intestinal infection. For this you have to consult your Physician to get a clinical examination and take a proper course of medicines like an antibiotic, metronidazole, probiotic for 5 to 7 days. If there is full response you will get a complete relief. If the problem is not solved you need further tests of : Investigations: *Routine blood investigations like Complete blood picture, blood sugar, urea, creatinine, liver function tests, thyroid function tests. *Urine -routine and microscopy *Stool: routine, microscopy, occult blood, culture and sensitivity. *Ultrasonography of abdomen, *Colonoscopy All these investigations should be within normal limits for one to say you have IBS.