• Hidetoshi Katsuno, Koutarou Maeda, Takashi Kaiho, Katsuyuki Kunieda, Kimihiko Funahashi, Junichi Sakamoto, Toru Kono, Hirotoshi Hasegawa, Yoshiyuki Furukawa, Yoshihiro Imazu, Satoshi Morita, and Masahiko Watanabe.
• Department of Surgery, Fujita Health University, School of Medicine, Toyoake katsuno@fujita-hu.ac.jp.
• Jpn. J. Clin. Oncol. 2015 Jul 1;45(7):650-6.

ObjectiveThis exploratory trial was performed to determine whether Daikenchuto accelerates recovery of gastrointestinal function in patients undergoing open colectomy for colon cancer.MethodsA total of 386 patients undergoing colectomy at 1 of the 51 clinical trial sites in Japan from January 2009 to June 2011 were registered for the study (JFMC39-0902). Patients received either placebo or Daikenchuto (15.0 g/day, t.i.d) between post-operative day 2 and post-operative day 8. Primary end-points included time to first bowel movement, frequency of bowel movement and stool form. The incidence of intestinal obstruction was evaluated post-operatively. The safety profile of Daikenchuto until post-operative day 8 was also evaluated.ResultsThe results for 336 patients (Daikenchuto, n = 174; placebo, n = 162) were available for statistical analysis. The time to first bowel movement did not differ significantly between the two groups. All patients reported having diarrhea or soft stools immediately after surgery, and the time until stool normalization (50th percentile) in the Daikenchuto and placebo groups was 6 days and 7 days, respectively. The placebo group had a significantly greater number of hard stools at post-operative day 8 (P = 0.016), and bowel movement frequency continued to increase until post-operative day 8 as well. In contrast, bowel movement frequency in the Daikenchuto group increased until post-operative day 6, however decreased from post-operative day 7 and was significantly lower at post-operative day 8 compared with the placebo group (P = 0.024).ConclusionThe moderate effects of Daikenchuto were observed ∼1 week after the operation. Although Daikenchuto had an effect on gastrointestinal function after open surgery in patients with colon cancer, this study did not show its clinical benefits adequately.© The Author 2015. Published by Oxford University Press.

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