title: A randomized, double-blind, placebo-controlled trial assessing the efficacy and safety of tegaserod in patients from China with chronic constipation.
abstract: OBJECTIVE
  To evaluate the efficacy and safety of tegaserod, 6 mg twice daily (b.i.d.), in men and women with chronic constipation (CC) from China.
  
  
  METHODS
  This was a multicenter, double-blind, placebo-controlled study. Following a 2-wk treatment-free baseline period, patients were randomized to receive either tegaserod (6 mg b.i.d.) or placebo (b.i.d.) for 4 wk. An analysis of covariance with repeated measures was used to determine the overall effect of treatment for the primary efficacy variable; the change from baseline in the number of complete spontaneous bowel movements (CSBMs) during the 4-wk treatment period. Secondary efficacy endpoints included other measures of response in terms of CSBMs, and patients' daily and weekly assessment of bowel habits. Safety was also assessed, based on the incidence and severity of adverse events (AEs).
  
  
  RESULTS
  A total of 607 patients were randomized to receive either tegaserod (n = 304) or placebo (n = 303). Tegaserod treatment resulted in a rapid and significant increase from baseline in the adjusted mean number of CSBMs per week over wk 1-4 compared with placebo (1.39 vs 0.91, P = 0.0002). A statistically significant difference in favor of tegaserod was also observed for a mean increase > or = 1 CSBM/wk over wk 1-4 (47.7% vs 35.0%, tegaserod vs placebo, respectively, P = 0.0018) and for the absolute number of > or = 3 CSBMs/wk over wk 1-4 (25.0% vs 14.5%, tegaserod vs placebo, respectively, P = 0.0021). Improvements in other symptoms of CC were also seen in the tegaserod group, including improved stool form and reduced straining. In addition, more patients in the tegaserod group reported satisfactory relief from their constipation symptoms. The frequency and severity of AEs was comparable between tegaserod and placebo groups, with the exception of a greater incidence of diarrhea in patients receiving tegaserod (3.6%) compared with placebo (1.7%).
  
  
  CONCLUSIONS
  Tegaserod treatment improved multiple symptoms of CC and was associated with a favorable safety profile.
authors.affiliation: The 3rd Hospital, Beijing Medical University, China.
authors.forename: San-Ren
authors.initials: SR
authors.lastname: Lin
authors.forename: Mei-Yun
authors.initials: MY
authors.lastname: Ke
authors.forename: Jin-Yan
authors.initials: JY
authors.lastname: Luo
authors.forename: Yao-Zong
authors.initials: YZ
authors.lastname: Yuan
authors.forename: Ji-Yao
authors.initials: JY
authors.lastname: Wang
authors.forename: Shelley
authors.initials: S
authors.lastname: diTommaso
authors.forename: Verena
authors.initials: V
authors.lastname: Walter
authors.forename: Jiaqing
authors.initials: J
authors.lastname: Huang
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002681:China; D002908:Chronic Disease; D003248:Constipation / Q000188:drug therapy*; D004311:Double-Blind Method; D005260:Female; D005765:Gastrointestinal Agents / Q000008:administration & dosage* / Q000009:adverse effects; D006801:Humans; D007211:Indoles / Q000008:administration & dosage* / Q000009:adverse effects; D008297:Male; D008875:Middle Aged; D010919:Placebos; D016896:Treatment Outcome
chemical_list: D005765:Gastrointestinal Agents; D007211:Indoles; D010919:Placebos; C105050:tegaserod