title: Enteric-coated peppermint-oil capsules in the treatment of irritable bowel syndrome: a prospective, randomized trial.
abstract: To determine the efficacy and tolerability of an enteric-coated peppermint-oil formulation (Colpermin), we conducted a prospective, randomized, double-blind, placebo-controlled clinical study in 110 outpatients (66 men/44 women; 18-70 years of age) with symptoms of irritable bowel syndrome. Patients took one capsule (Colpermin or placebo) three to four times daily, 15-30 min before meals, for 1 month. Fifty-two patients on Colpermin and 49 on placebo completed the study. Forty-one patients on Colpermin (79%) experienced an alleviation of the severity of abdominal pain (29 were pain-free); 43 (83%) had less abdominal distension, 43 (83%) had reduced stool frequency, 38 (73%) had fewer borborygmi, and 41 (79%) less flatulence. Corresponding figures for the placebo group were: 21 patients (43%) with reduced pain (4 were pain-free), 14 (29%) with reduced distension, 16 (32%) with reduced stool frequency, 15 (31%) with fewer borborygmi, and 11 (22%) with less flatulence. Symptom improvements after Colpermin were significantly better than after placebo (P < 0.05; Mann-Whitney U-test). One patient on Colpermin experienced heartburn (because of chewing the capsules) and one developed a mild transient skin rash. There were no significant changes in liver function test results. Thus, in this trial, Colpermin was effective and well tolerated.
authors.affiliation: Department of Internal Medicine, Taichung Veterans General Hospital, Taiwan.
authors.forename: J H
authors.initials: JH
authors.lastname: Liu
authors.forename: G H
authors.initials: GH
authors.lastname: Chen
authors.forename: H Z
authors.initials: HZ
authors.lastname: Yeh
authors.forename: C K
authors.initials: CK
authors.lastname: Huang
authors.forename: S K
authors.initials: SK
authors.lastname: Poon
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D003109:Colonic Diseases, Functional / Q000188:drug therapy*; D004311:Double-Blind Method; D005260:Female; D006801:Humans; D008297:Male; D036142:Mentha piperita; D008875:Middle Aged; D009822:Oils, Volatile / Q000627:therapeutic use; D010276:Parasympatholytics / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use*; D010938:Plant Oils / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use*; D011446:Prospective Studies; D016896:Treatment Outcome
chemical_list: D009822:Oils, Volatile; D010276:Parasympatholytics; D010938:Plant Oils; C015424:peppermint oil