title: Effect of preoperative lactulose on posthaemorrhoidectomy pain.
mesh_terms: D004187:Disaccharides / Q000627:therapeutic use*; D006484:Hemorrhoids / Q000601:surgery*; D006801:Humans; D007792:Lactulose / Q000627:therapeutic use*; D010149:Postoperative Pain / Q000517:prevention & control*
chemical_list: D004187:Disaccharides; D007792:Lactulose