Randomised clinical trial: the effectiveness of Gaviscon Advance vs non-alginate antacid in suppression of acid pocket and post-prandial reflux in obese individuals after late-night supper

• Published in: Alimentary Pharmacology and Therapeutics
• Main Author: Deraman M.A.; Abdul Hafidz M.I.; Lawenko R.M.; Ma Z.F.; Wong M.S.; Coyle C.; Lee Y.Y.
• Format: Article
• Language: English
• Published: Blackwell Publishing Ltd 2020
• Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85084007878&doi=10.1111%2fapt.15746&partnerID=40&md5=82ecf0cbd891243dc8fd9efbc6df83e2

Background: Late-night supper increases the risk of postprandial reflux from the acid pocket especially in obesity. An alginate-based, raft-forming medication may be useful for obese patients with GERD. Aims: To compare the efficacy of Gaviscon Advance (Reckitt Benckiser, UK) and a non-alginate antacid in post-supper suppression of the acid pocket and post-prandial reflux among obese participants. Methods: Participants underwent 48 h wireless and probe-based pH-metry recording of the acid pocket and lower oesophagus, respectively, and were randomised to single post-supper (10 pm) dose of either Gaviscon Advance or a non-alginate antacid on the second night. Primary outcomes were suppression of median pH of acid pocket and lower oesophagus, measured every 10-minutes post-supper for 1 h. Secondary outcomes were suppression of % time pH < 4 at lower oesophagus and improvement in frequency and visual analogue score (VAS) of regurgitation. Results: Of the 81 screened participants, 55 were excluded and 26 (mean age 33.5 years, males 77.8% and BMI 32.8 kg/m2) were randomised to Gaviscon Advance (n = 13) or antacid (n = 13). Median pH of the acid pocket but not the lower oesophagus was suppressed with Gaviscon Advance vs antacid (all P < 0.04) Gaviscon Advance but not antacid significantly reduced in % time pH < 4, symptom frequency and VAS on day 2 vs day 1 (all P < 0.05). Conclusions: Among obese individuals, Gaviscon Advance was superior to a non-alginate antacid in post-supper suppression of the acid pocket. (Clinical trial registration unique identifier: NCT03516188). ©2020 The Authors. Alimentary Pharmacology & Therapeutics published by John Wiley & Sons Ltd