Our expert says:
It depends on what kind of tests were used to diagnose the IBS. If your fiancé had a colonoscopy then the dr would have been able to clearly see if she has IBS or Crohn's disease - so if she has not had a colonoscopy then this is something she could discuss with her physician. Crohn's disease does, however, have many other symptoms besides flatulence, distention and abdominal pain, including rectal bleeding, fever during acute bouts, etc. I must admit that I am not acquainted with this medication and I would suggest that your fiancé should also discuss using this or any other medication with the physician as some medications could cause more harm than good.
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