I just accidentally stumbled across this blog of IBS suffers. I've had IBS for over 20 years. I have recently discovered some relief, that I thought I would share with you. It won't help everyone but has helped myself and my daughter immensely. I started taking Fennel (capsules) and Peppermint Oil (capsules). The fennel helps with the gas and the Peppermint helps with the cramping/bloating. You can get them in health food stores or on Amazon.com. Make sure you're not allergic before taking. I got relief immediately and have had only 2 flare ups since and that was because I didn't take them.
Like I said, they won't help everyone, but they're a better alternative than drugs.