Compound Sodium Alginate Double Action Chewable Tablets 4-hour Esophageal pH Study in GERD Patients

A Multi-centred, Randomised, Open Label, Placebo-controlled, Two-period Crossover Study to Evaluate 4-hour Esophageal pH Change in GERD Patients After Administration of Compound Sodium Alginate Double Action Chewable Tablets or Matching Placebo Tablets

This study is being conducted to assess the effectiveness of the Compound Sodium Alginate Double Action Chewable Tablets compared to placebo on acidic reflux events into the esophagus in patients diagnosed with Gastroesophageal Reflux Disease (GERD).

Study Overview

• Status: Completed
• Conditions: Gastroesophageal Reflux Disease
• Intervention / Treatment: Drug: Placebo; Drug: Sodium Alginate Double Action Chewable Tablets

• Study Type: Interventional
• Enrollment (Actual): 45
• Phase: Phase 3

Contacts and Locations

Study Locations

• China
  • Shanghai, China
    • RB Investigational Sites

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years to 65 years (Adult, Older Adult)
• Accepts Healthy Volunteers: No

Description

Inclusion Criteria:

• meets the diagnostic criteria for GERD with a GERD history of frequent episodes of GERD-related symptoms during the last 2 months prior to study screening. The patient must also meet the following criteria:

  1. The only or main symptom is heartburn (burning feeling back of breast bone) and/or acid reflux. Symptoms persist or have occurred repeatedly for more than 2 months;
  2. As assessed by the Investigator at screening by questioning of the patient, the frequency of occurrence of heartburn is ≥ 3 days/week and the score of severity of heartburn in general is ≥ moderate within 3 weeks before screening

Exclusion Criteria:

• Patients who have a history of drug, solvent or alcohol abuse (weekly alcohol intake ≥ 140 g).
• Patients who have suffered cardiac chest pain within the last year.
• Patients who have suffered a recent, significant unexplained weight loss of more than 6 kg in the last 6 months.
• Female patients of childbearing potential who, for the duration of the study, are either unwilling or unable to take adequate contraceptive precautions or are unwilling to be sexually abstinent.
• Pregnancy or lactating mother.
• Patients with a history and/or symptom profile suggestive of the following: any other gastrointestinal (GI) disease, erosive GERD (Los Angeles [LA] classification grades C-D), Barrett's oesophagus, acute peptic ulcer and/or ulcer complications, Zollinger-Ellison syndrome, gastric carcinoma, pyloric stenosis, oesophageal or gastric surgery, intestinal obstruction, current pernicious anaemia, indication for H. pylori eradication therapy, known gastrointestinal bleeding (hematochezia or hematemesis) within the last 3 months, and severe diseases of other major body systems.
• Patients who are observed at screening to have a hiatus hernia with a diameter which exceeds 3 cm.
• Patients who have taken anti-cholinesterase drugs, traditional Chinese medicines for treating gastrointestinal disease, ulcerlmin or misoprostol preparations within 7 days prior to screening or throughout the study.
• Patients who have taken PPIs during the 10 days prior to screening, prokinetics or H2 antagonists during the 5 days prior to screening or systemic glucocorticosteroids, non-steroidal anti-inflammatory drugs (except for low dose aspirin which can be given for cardioprotection) on more than 3 consecutive days or PPI-based triple or quadruple therapy for eradication of H. pylori during the last 28 days.
• Patients taking or requiring to take macrolide antibiotics, such as erythromycin, azithromycin, from the day before screening.
• Patients with difficulty in swallowing.
• Patients with known hypophosphataemia, phenylketonuria or hypercalcaemia.
• Patients with severe constipation, or history of intestinal obstruction.
• In the opinion of the Investigator, patients with damaged heart or kidney function and patients who require a low sodium diet.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Randomized
• Interventional Model: Crossover Assignment
• Masking: None (Open Label)

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Active Comparator: Sodium Alginate Double Action Chewable Tablets, then Placebo tablets; 4 Compound Sodium Alginate Double Action Chewable Tablets administered as a single dose, followed by 7 days of Compound Sodium Alginate Double Action Chewable Tablets (two tablets four times daily), then a single dose of 4 Placebo tablets	Drug: Sodium Alginate Double Action Chewable Tablets; 4 tablets as a single dose; Other Names: Gaviscon Double Action Tablets
Placebo Comparator: Placebo tablets, then Sodium Alginate Double Action Chewable Tablets; Single dose of 4 Placebo tablets, followed by 7 days of Compound Sodium Alginate Double Action Chewable Tablets (two tablets four times daily), then a single dose of 4 Compound Sodium Alginate Double Action Chewable Tablets	Drug: Placebo; 4 tablets as a single dose; Drug: Sodium Alginate Double Action Chewable Tablets; 4 tablets as a single dose; Other Names: Gaviscon Double Action Tablets

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Percentage of Time During the 4-hour Post-dosing Period With pH Below pH 4	The primary efficacy endpoint will be the percentage of time during the 4-hour post-dosing period with pH below pH 4 for Compound Sodium Alginate Double Action Chewable Tablets versus matching placebo tablets	0 to 4 hours post-dose

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Percentage of Time During the 4-hour Post-dosing Period With pH Below pH 5	Percentage of time during the 4-hour post-dosing period with pH below pH 5 for Compound Sodium Alginate Double Action Chewable Tablets versus matching placebo tablets	0 to 4 hours post-dose
Number of Occasions During the 4-hour Post-dosing Period When pH Falls Below pH 4	Number of occasions during the 4-hour post-dosing period when pH falls below pH 4 for Compound Sodium Alginate Double Action Chewable Tablets versus matching placebo tablets	0 to 4 hours post-dose
Number of Occasions During the 4-hour Post-dosing Period When pH Falls Below pH 5	Number of occasions during the 4-hour post-dosing period when pH falls below pH 5 for Compound Sodium Alginate Double Action Chewable Tablets versus matching placebo tablets	0 to 4 hours post-dose
Number of Reflux Episodes During the 4-hour Post-dosing Period With pH Below pH 4 for at Least 5 Minutes	Number of reflux episodes during the 4-hour post-dosing period with pH below pH 4 for at least 5 minutes for Compound Sodium Alginate Double Action Chewable Tablets versus matching placebo tablets	0 to 4 hours post-dose
Percentage of Time During the First Hour Post-dosing With pH Below pH 4	Percentage of time during the first hour post-dosing with pH below pH 4 for Compound Sodium Alginate Double Action Chewable Tablets versus matching placebo tablets	0 to 1 hour post-dose
Percentage of Time During the First Hour Post-dosing With pH Below pH 5	Percentage of time during the first hour post-dosing with pH below pH 5 for Compound Sodium Alginate Double Action Chewable Tablets versus matching placebo tablets	0 to 1 hour post-dose
Number of Occasions During the First Hour Post-dosing When pH Falls Below pH 4	Number of occasions during the first hour post-dosing when pH falls below pH 4 for Compound Sodium Alginate Double Action Chewable Tablets versus matching placebo tablets	0 to 1 hour post-dose
Number of Occasions During the First Hour Post-dosing When pH Falls Below pH 5	Number of occasions during the first hour post-dosing when pH falls below pH 5 for Compound Sodium Alginate Double Action Chewable Tablets versus matching placebo tablets	0 to 1 hour post-dose
The Longest Reflux Time During the 4-hour Post-dosing Period (i.e. the Longest Period With pH Below pH 4)	The longest reflux time during the 4-hour post-dosing period (i.e. the longest period with pH below pH 4) for Compound Sodium Alginate Double Action Chewable Tablets versus matching placebo tablets	0 to 4 hours post-dose
The DeMeester Scores During the 4-hour Post-dosing Period	The DeMeester scores during the 4-hour post-dosing period for Compound Sodium Alginate Double Action Chewable Tablets versus matching placebo tablets. The DeMeester score is a composite score of the acid exposure during a prolonged ambulatory pH monitoring. The parameters that constitute the score are number of reflux episodes, number of episodes longer than 5 minutes, longest reflux duration, total percentage of monitoring time with pH below 4, and the percentage of time with pH below 4 in an upright position and supine position, respectively. The DeMeester score is the sum of the scores calculated for each of the 6 parameters. A score more than 14.7 is considered abnormal acid reflux, scores between 14.7 and 100 are regarded as mild-to-moderate GERD, and a score greater than 100 is regarded as severe GERD.	0 to 4 hours post-dose

Collaborators and Investigators

• Sponsor: Reckitt Benckiser Healthcare (UK) Limited
• Investigators: Principal Investigator: Yuan Yaozong, MD, PhD, Shanghai Jiao Tong University, School of Medicine, Shanghai, China

Study record dates

Study Major Dates

• Study Start (Actual): July 2, 2013
• Primary Completion (Actual): December 1, 2013
• Study Completion (Actual): December 1, 2013

Study Registration Dates

• First Submitted: May 31, 2013
• First Submitted That Met QC Criteria: June 5, 2013
• First Posted (Estimated): June 7, 2013

Study Record Updates

• Last Update Posted (Actual): April 29, 2025
• Last Update Submitted That Met QC Criteria: April 23, 2025
• Last Verified: April 1, 2025

More Information

Terms related to this study

• Keywords: GERD; Gastroesophageal Reflux Disease; Acid reflux; Gaviscon Double Action Tablets; Compound Sodium Alginate Double Action Chewable Tablet
• Additional Relevant MeSH Terms: Digestive System Diseases; Gastrointestinal Diseases; Esophageal Diseases; Esophageal Motility Disorders; Deglutition Disorders; Gastroesophageal Reflux; Molecular Mechanisms of Pharmacological Action; Gastrointestinal Agents; Antacids; Alginate, aluminium hydroxide, magnesium trisilicate, sodium bicarbonate drug combination
• Other Study ID Numbers: GA1202