Answer
The protective raft formed by Gaviscon Advance Aniseed Flavour Oral Suspension impedes gastro-oesophageal reflux for up to 4 hours.
Sources for this answer
- Gaviscon Advance Aniseed flavour Oral SuspensionReckitt Benckiser Healthcare (UK) Ltd · emc · SmPC §5.1 Pharmacodynamic properties · Version 7Document updated
Sources checked