[Open, multicenter, phase Ⅳ clinical trial of Shenbei Guchang capsules in treatment of diarrhea type irritable bowel syndrome].

To evaluate the safety and effectiveness of Shenbei Guchang capsules in treatment of diarrhea type irritable bowel syndrome (yang deficiency of spleen and kidney) under widely used conditions, an open, multicenter, controlled, phase Ⅳ clinical trial was conducted in the drug clinical trial centers of 16 domestic hospitals. 2 123 patients from June 10, 2011 to November 29, 2012 were enrolled in the trial. Drug clinical trial was approved by Sichuan Academy of Medical Sciences, Sichuan Provincial People's Hospital Ethics Committee before implementation. Before the start of trial, subjects were selected according to the research scheme and inclusion criteria, then they would step into the 14 d study after signing Informed Consent Form. All subjects were treated according to the research scheme, evaluated the conditions and filled in CFR sheet, to provide the evaluation data and information on safety and efficacy of Shenbei Guchang capsules. Shenbei Guchang capsules were used to treat diarrhea type irritable bowel syndrome in widely used conditions (2 123 cases), and 2 029 cases of them entered FAS set, cure+markedly effective in 1 921 cases, with a comprehensive curative effect rate of 94.68%; 2 010 cases of them entered PPS set, cure+markedly effective in 1 906 cases, with a comprehensive curative effect rate of 94.83%. The primary symptoms of IBS were abdominal pain and diarrhea. After treatment, both abdominal pain and diarrhea were improved, with significant differences (P<0.000 1). There were significant differences in traditional Chinese medicine symptom scores on both post-treatment day 7 and day 14 as compared with the conditions before treatment (P<0.000 1). 35 cases of adverse events occurred during the trial with an incidence of 1.65%, including 12 cases of drug-related adverse events (adverse reaction) with an incidence of 0.57%, mainly manifested as nausea, abdominal distension and dry mouth, most of which would be spontaneously relieved without any measures. No serious adverse events occurred. The commercially available Shenbei Guchang capsules are proved safe and effective for the treatment of diarrhea type irritable bowel syndrome (yang deficiency of spleen and kidney) under widely used conditions (2 123 cases), and can be continued for clinical promotion and application.