title: The effect of sennosides on colonic mucosal histology and bowel preparation.
abstract: BACKGROUND
  A single high dose of sennosides is often used to optimize bowel preparation for diagnostic procedures. From previous studies it is suspected that sennosides in such a dose cause acute damage to the colonic mucosa. This study was designed to determine any effects of sennosides on histology of colonic mucosa and on bowel preparation.
  
  
  RESULTS
  In a prospective study 171 patients were randomized for bowel preparation. 84 patients received 1 ml/kg (maximal 75 ml) of a syrup containing 2.0 mg/ml sennoside A and B and 3-5 l of a lavage solution (Sen), 87 patients only received 3-5 l lavage solution (NSen). All patients completed a questionnaire on which patient tolerance was scored. Another questionnaire was completed by the endoscopist, recording quality of the preparation. From the 40 patients with a normal colon (19 Sen, 21 NSen) a biopsy was taken from the sigmoid colon and analyzed for morphological abnormalities. No difference could be demonstrated in tolerance or quality of bowel preparation between the two groups. A marked increase of mononuclear infiltrate in the lamina propria was observed in Sen compared to NSen: in 10/19 vs. 2/21 patients respectively, p < 0.0005.
  
  
  CONCLUSIONS
  As these microscopic effects could hamper the interpretation of colonic biopsies, bowel preparation without sennosides is to be recommended.
authors.affiliation: Department of Gastroenterology and Hepatology, University Hospital, Groningen, The Netherlands.
authors.forename: B A
authors.initials: BA
authors.lastname: van Gorkom
authors.forename: A
authors.initials: A
authors.lastname: Karrenbeld
authors.forename: A J
authors.initials: AJ
authors.lastname: Limburg
authors.forename: J H
authors.initials: JH
authors.lastname: Kleibeuker
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000880:Anthraquinones / Q000494:pharmacology*; D001706:Biopsy; D002400:Cathartics / Q000494:pharmacology*; D003106:Colon / Q000187:drug effects / Q000473:pathology; D003113:Colonoscopy; D005260:Female; D006801:Humans; D007413:Intestinal Mucosa / Q000187:drug effects* / Q000473:pathology; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D012676:Senna Extract; D000081226:Sennosides; D007507:Therapeutic Irrigation
chemical_list: D000880:Anthraquinones; D002400:Cathartics; D000081226:Sennosides; D012676:Senna Extract