title: A randomized, double-blind, placebo-controlled clinical study of the histamine H2-receptor antagonist famotidine in Japanese patients with nonerosive reflux disease.
abstract: BACKGROUND
  To investigate whether histamine H2-receptor antagonists are sufficient to treat heartburn in nonerosive reflux disease in Japanese, who produce less gastric acid than Westerners, the efficacy of famotidine in Japanese nonerosive reflux disease patients was studied in a double-blind, placebo-controlled, parallel group-comparative, multicenter study.
  
  
  METHODS
  The Los Angeles classification system with Japanese modifications was used to assess the severity of nonerosive reflux disease. Famotidine (10-or 20-mg doses) or placebo was administered to patients twice daily for 8 weeks. Heartburn symptoms were recorded daily by patients.
  
  
  RESULTS
  A total of 528 patients participated in the study. The percentage of days without heartburn, the primary end point of the efficacy evaluation, was 62% for 40 mg and 59% for 20 mg of famotidine, and 55% for placebo, with a statistically significant difference between the 40-mg dose and placebo (P = 0.001; significance level, 0.025 one-sided). Famotidine at both doses provided immediate relief from heartburn, and relief persisted throughout the 8-week study with the 40-mg dose.
  
  
  CONCLUSIONS
  The results indicate that famotidine relieves heartburn symptoms in Japanese nonerosive reflux disease patients.
authors.affiliation: Departments of Comprehensive Medicine and Psychosomatic Medicine, Tohoku University Hospital, 1-1 Seiryo-machi, Aoba, Sendai 980-8574, Japan.
authors.forename: Michio
authors.initials: M
authors.lastname: Hongo
authors.forename: Yoshikazu
authors.initials: Y
authors.lastname: Kinoshita
authors.forename: Ken
authors.initials: K
authors.lastname: Haruma
mesh_terms: D004311:Double-Blind Method; D015738:Famotidine / Q000009:adverse effects / Q000627:therapeutic use*; D005260:Female; D005764:Gastroesophageal Reflux / Q000188:drug therapy*; D006356:Heartburn / Q000209:etiology; D006635:Histamine H2 Antagonists / Q000009:adverse effects / Q000627:therapeutic use*; D006801:Humans; D008297:Male; D008875:Middle Aged
chemical_list: D006635:Histamine H2 Antagonists; D015738:Famotidine