I am IBS-C and I can't figure out why my doc prescribes medicines that relax the bowel like Levbid or Bentyl. I know they are good for spasms, but it seems like these kinds of drugs would make constipation worse. Also -has anyone taken the new drug for IBS symptoms called Pamine? I have prescription, but I would have to fight with my HMO to get it filled. They don't like to pay for those brand new expensive drugs!