I've suffered from IBS for about ten years (although not knowly).
Caffine - I've cut it out completly. I had one glass of pepsi last month and within half an hour i was on the loo for 45 mins
Fibre - I enjoy bread/ceral but can only have white bread as any fibre just get me running to the loo. (I'm even making my own bread to cut out the additives)
Fruit/Veg - I used to be able to eat fruit when i younger and loved it but at the moment i can only eat potatoes(even these seem to cause problems.)
I've been to the doc and have tried Spasmonal (Really didn't do anything for me), Colpermin(pepermint oil caps but again no real improvement. Im now using Amitriptyline(2 tab per day) and Loperamide (When needed which is 2-3 times a week.)
The amitriptyline does seem to reduce the spasms, but there are side effects. For me excess sweating is caused which isn't great when i've already got a stammer and severe IBS and i wonder why i'm single :-)
I've now be refered to the hospital for a Colonoscopy(Joy), i've also had blood tests for glutin and all the normal possible probs.
Stress - this is one that i do know does affects me, as i have a stammer i'm always worried about my next sentence, work stress isn't helping ether.
My main probs are, loose stools (To the point where i carry moist toilet paper wipes everywhere i go), Cramps caused by the diarrhea, and generally feeling run down due to the IBS.
As i type this i'm sitting with a heat pad on my lower ab, If anyone can suggest something that i haven't tried as the IBS is getting worse.