title: A double-blind, placebo-controlled study of the efficacy and safety of non-prescription ranitidine 75 mg in the prevention of meal-induced heartburn.
abstract: BACKGROUND
  Ranitidine 75 mg (Zantac 75) has been shown to be effective for the treatment of pre-existing heartburn symptoms.
  
  
  OBJECTIVE
  To compare the efficacy of dosing ranitidine 75 mg or placebo 30 min prior to a proven heartburn-provoking meal in completely preventing or reducing subsequent heartburn symptoms.
  
  
  METHODS
  A randomized, double-blind, parallel methodology was used at nine investigative centres. Following a screening visit, patients ate a standard test meal consisting of chili, chips and a soft drink on two occasions. On the first occasion, patients received single-blind placebo 30 min before the meal. This meal was used to qualify patients and to ensure the onset of a minimum level of heartburn. Patients who qualified were randomized (n = 284) to receive double-blind ranitidine 75 mg or placebo 30 min before a second test meal administered 4-14 days later at the treatment visit. Patients recorded whether heartburn was present and rated heartburn severity by completing visual analogue scales at 15-min intervals over the 4. 5 h meal evaluation periods.
  
  
  RESULTS
  Statistically significant differences favouring ranitidine 75 mg were determined for complete prevention of heartburn (P < 0.006), heartburn severity area under the curve (P < 0.001), a clinical success end-point (P < 0.001), and all other end-points (P < 0.001).
  
  
  CONCLUSIONS
  These data clearly demonstrate that ranitidine 75 mg is effective in completely preventing or decreasing heartburn when administered 30 min prior to a provocative meal.
authors.affiliation: Global OTC Clinical Development, Glaxo Wellcome Inc., Research Triangle Park, North Carolina 27709, USA. kap6089@Glaxowellcome.com
authors.forename: K A
authors.initials: KA
authors.lastname: Pappa
authors.forename: B O
authors.initials: BO
authors.lastname: Williams
authors.forename: J E
authors.initials: JE
authors.lastname: Payne
authors.forename: K S
authors.initials: KS
authors.lastname: Buaron
authors.forename: K L
authors.initials: KL
authors.lastname: Mussari
authors.forename: A A
authors.initials: AA
authors.lastname: Ciociola
mesh_terms: D000328:Adult; D000897:Anti-Ulcer Agents / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use*; D004311:Double-Blind Method; D005260:Female; D005502:Food / Q000009:adverse effects; D006356:Heartburn / Q000517:prevention & control*; D006801:Humans; D008297:Male; D004366:Nonprescription Drugs; D011899:Ranitidine / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use*; D016896:Treatment Outcome
chemical_list: D000897:Anti-Ulcer Agents; D004366:Nonprescription Drugs; D011899:Ranitidine