Basel, 20 May 2003 - New data from a large pivotal US trial demonstrates ZelmacÒ* (tegaserod) was significantly more effective than placebo in providing rapid and sustained relief from chronic constipation based on a trial of more than 1,300 patients. Furthermore, Zelmac provided relief of several chronic constipation symptoms including bowel movement frequency, straining, stool consistency, abdominal discomfort or pain, bloating or distension.