My husband had an attack of abdominal pain with fever for the first time about ten years ago which the doctor diagnosed as ibs. He was prescribed mebeverine (not sure if that helped but he recovered in about 48 hours anyway. Since then he has suffered the same pain about once a year or so, sometimes with a temperature and sometimes not, nothing seems to help the pain and it usually only lasts 24-48 hours. Has anyone experienced anything similar? The pain seems to start off mild and get worse over the first 12 hours and comes in waves.