Just to let you know that Zelnorm is specially designed for women. However, you should only take this if you have constipation type IBS. It is contraindicated in cases of diarrhea and you should not take it, as it contains an ingredient in it that makes diarrhea a hell of a lot worse and that is how it revearses constipation.
Just a note - Zelnorm's not specially designed for women, it's just not approved for men yet. There were too few men in the drug's FDA approval trials for it to be approved for them as well. I guess the manufacturers figure that because over 70% of IBS sufferers are women, that that's good enough...??