A Phase 3 interventional study of Sodium Alginate Double Action Chewable Tablets and Placebo in Gastroesophageal Reflux Disease, sponsored by Reckitt Benckiser Healthcare (UK) Limited. Completed at 1 site in China. Open to participants aged 18 Years to 65 Years. Per ClinicalTrials.gov, last updated 2025-04-29.
Sponsored by Reckitt Benckiser Healthcare (UK) Limited (part of Reckitt) · Phase 3, Interventional, and Treatment
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).
1,211 studies on the registry are indexed under Gastroesophageal Reflux; 202 are open to participants now.
This study's enrollment of 45 is below the median of 68 across 796 interventional studies indexed under Gastroesophageal Reflux.
Browse Gastroesophageal Reflux studies →Reckitt Benckiser Healthcare (UK) Limited is the lead sponsor of 35 studies on the registry; none are open to participants now.
Counted across the registry records on this site, refreshed daily.
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
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:
Exclusion Criteria:
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Able to become pregnant: from the first period until menopause, unless permanently unable to through surgery (removal of the womb, or of both ovaries or both fallopian tubes).
Criteria for people of childbearing potential usually ask for a negative pregnancy test and for contraception during the study and for a time after it.
Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.
Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.
Childbearing potential
Able to become pregnant: from the first period until menopause, unless permanently unable to through surgery (removal of the womb, or of both ovaries or both fallopian tubes).
Criteria for people of childbearing potential usually ask for a negative pregnancy test and for contraception during the study and for a time after it.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Contraception
Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.
Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
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
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: Sodium Alginate Double Action Chewable Tablets · Drug: Placebo
4 tablets as a single dose
Also known as: Gaviscon Double Action Tablets
4 tablets as a single dose
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
Time frame: 0 to 4 hours post-dose
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
Time frame: 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
Time frame: 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
Time frame: 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
Time frame: 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
Time frame: 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
Time frame: 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
Time frame: 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
Time frame: 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
Time frame: 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.
Time frame: 0 to 4 hours post-dose
| Milestone | Group A | Group B |
|---|---|---|
| Started | 22 | 23 |
| Completed | 21 | 23 |
| Not completed | 1 | 0 |
| Withdrew: Withdrawal by subject | 1 | 0 |
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
| percentage of time with pH below pH 4 | Sodium Alginate Double Action Chewable Tablets | Placebo Tablets |
|---|---|---|
| Percentage of Time During the 4-hour Post-dosing Period With pH Below pH 4 | 5.14 (-0.27 to 10.56) | 14.94 (9.52 to 20.35) |
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
| percentage of time with pH below pH 5 | Sodium Alginate Double Action Chewable Tablets | Placebo Tablets |
|---|---|---|
| Percentage of Time During the 4-hour Post-dosing Period With pH Below pH 5 | 10.40 (3.40 to 17.40) | 26.16 (19.16 to 33.16) |
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
| Number of occasions pH fell below 4 | Sodium Alginate Double Action Chewable Tablets | Placebo Tablets |
|---|---|---|
| Number of Occasions During the 4-hour Post-dosing Period When pH Falls Below pH 4 | 11.5 (3.4 to 19.6) | 30.9 (22.8 to 39.1) |
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
| Number of occasions pH fell below 5 | Sodium Alginate Double Action Chewable Tablets | Placebo Tablets |
|---|---|---|
| Number of Occasions During the 4-hour Post-dosing Period When pH Falls Below pH 5 | 17.3 (9.5 to 25.1) | 33.6 (25.8 to 41.4) |
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
| Number of reflux episodes | Sodium Alginate Double Action Chewable Tablets | Placebo Tablets |
|---|---|---|
| Number of Reflux Episodes During the 4-hour Post-dosing Period With pH Below pH 4 for at Least 5 Minutes | 0.6 (-0.1 to 1.3) | 1.4 (0.7 to 2.1) |
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
| percentage of time with pH below pH 4 | Sodium Alginate Double Action Chewable Tablets | Placebo Tablets |
|---|---|---|
| Percentage of Time During the First Hour Post-dosing With pH Below pH 4 | 2.00 (-3.43 to 7.44) | 16.41 (10.98 to 21.84) |
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
| percentage of time with pH below pH 5 | Sodium Alginate Double Action Chewable Tablets | Placebo Tablets |
|---|---|---|
| Percentage of Time During the First Hour Post-dosing With pH Below pH 5 | 4.23 (-2.82 to 11.29) | 27.60 (20.55 to 34.65) |
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
| Number of occasions pH fell below 4 | Sodium Alginate Double Action Chewable Tablets | Placebo Tablets |
|---|---|---|
| Number of Occasions During the First Hour Post-dosing When pH Falls Below pH 4 | 1.7 (-0.6 to 4.0) | 9.1 (6.7 to 11.4) |
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
| Number of occasions pH fell below 5 | Sodium Alginate Double Action Chewable Tablets | Placebo Tablets |
|---|---|---|
| Number of Occasions During the First Hour Post-dosing When pH Falls Below pH 5 | 3.1 (0.8 to 5.4) | 9.5 (7.2 to 11.8) |
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
| minutes | Sodium Alginate Double Action Chewable Tablets | Placebo Tablets |
|---|---|---|
| The Longest Reflux Time During the 4-hour Post-dosing Period (i.e. the Longest Period With pH Below pH 4) | 3.3 (-1.3 to 7.9) | 9.6 (5.1 to 14.2) |
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.
| score on a scale | Sodium Alginate Double Action Chewable Tablets | Placebo Tablets |
|---|---|---|
| The DeMeester Scores During the 4-hour Post-dosing Period | 14.842 (2.125 to 27.560) | 38.987 (26.270 to 51.704) |
Collected over Up to 19 days, from the time informed consent was provided until the Day 7 (+/- 2 days) visit. Non-serious events are listed at a 0% frequency threshold.
| Group | Deaths | Serious | Other |
|---|---|---|---|
| Group A | 0/22 (0%) | 0/22 (0%) | 0/22 (0%) |
| Group B | 0/23 (0%) | 0/23 (0%) | 2/23 (8.7%) |
| Event | Group A | Group B |
|---|---|---|
| White blood cell count decreasedInvestigations | 0/22 | 2/23 |
| Age, Categorical(Participants) | Group A | Group B | Total |
|---|---|---|---|
| <=18 years | 0 | 0 | 0 |
| Between 18 and 65 years | 21 | 23 | 44 |
| >=65 years | 1 | 0 | 1 |
| Age, Continuous(years) | Group A | Group B | Total |
|---|---|---|---|
| Mean | 41.6 ± 15.27 | 39.3 ± 16.90 | 40.4 ± 15.98 |
| Sex: Female, Male(Participants) | Group A | Group B | Total |
|---|---|---|---|
| Female | 11 | 8 | 19 |
| Male | 11 | 15 | 26 |
| Race/Ethnicity, Customized(Participants) | Group A | Group B | Total |
|---|---|---|---|
| Caucasian | 0 | 0 | 0 |
| Asian | 22 | 23 | 45 |
| Afro-Caribbean | 0 | 0 | 0 |
| Other | 0 | 0 | 0 |
| Region of Enrollment(participants) | Group A | Group B | Total |
|---|---|---|---|
| China | 22 | 23 | 45 |
PDFs hosted by the registry, ClinicalTrials.gov.
Ran from Jul 2013 to primary completion in Dec 2013, 5 months.
Results were first posted in Apr 2025, 11 years 4 months after primary completion.
Of 20 phase 3 interventional studies under Gastroesophageal Reflux, half reached primary completion within 19 months of starting (the median), counting those still running; a quarter within 12 and three quarters within 49. This study's 5 months is below that.
How these figures are worked out, and which studies are left out of them.
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