Is Lotronex a real new medicine, or it's a trade name of an old one? What is the main drastic substance of this medicine? How it works? Is it proper for IBS D only or both types of IBS? I did n't find the answer in Glaxo site, did any of you? Please,it's important to know to know cause i don't know when this medicine will come to my country, and be prescribed by Drs. I intend to find it from US. I m really desperate of IBS symptoms.