Answer
Diarrhoea, nausea and vomiting are listed as uncommon gastrointestinal side effects of Gaviscon Advance Aniseed Flavour Oral Suspension.
Sources for this answer
- Gaviscon Advance Aniseed flavour Oral SuspensionReckitt Benckiser Healthcare (UK) Ltd · emc · SmPC §4.8 Undesirable effects · Version 7Document updated
Sources checked