I have IBS and am on my second specialist. It all starts anywhere from 1/2 hour up to 3 hours later after a meal. I eat and then the stomach starts to hurt and then pain starts that I can only compare to the worst Stomach Flu. Until the regular stool is gone the pain intensifies, until I can go to the bathroom. Even at this point it isn't over for another 6,7 or 10 trips to the bathroom till nothing is left. Then the next day or so I feel like I'm totally drained. I'm taking new medicine and it really seems to help. I take ASACOL 400MG, 2 tablets-3 times a day and at the same time I take either Fiber Con or Colon Care Fromula from GNC. 1 Fiber Con and the Colon Care from GNC-3 tablets each time I take the ASACOL. The biggest relief is the next medicine called Dicyclomine 20MG Tablets. This for me has been a big help and relief when things start, I take one of these and I may have a small bout of Diarreha but really helps with the stomach pain.
I realize this may not help everyone but it has really helped me. The pain that happenes with this IBS for me is the worst pain felt by me. If you can imagine some one kicking me where it sounts and having a car parked on your lower back along with the angry growling moving stomach. nothing but oining and groining. Then it is drained and a beat up feeling for the next couple days.
I do not drink Orange Juice and very little milk and sods pop. Per doctors instructions stay aware from acids.
I hope this helps!