Be aware that Zelnorm (aka tegaserod) can cause extra bloating for the first week or so. Same goes for the nausea and cramping. I also got headaches for the first few days.
Please take all the precautions (pulled from Yahoo Health):
Please Note: There have been rare cases of rectal bleeding and severe abdominal pain in patients treated with Zelnorm. Some of these problems were related to insufficient blood flow to part of the bowel. It is not known if this was related to Zelnorm use.
Let us know how it goes. Good luck!