Answer
Severe renal insufficiency is a contraindication. Mild-to-moderate impairment requires caution because calcium and magnesium may accumulate.
Sources for this answer
- Rennie Heartburn, Indigestion & Wind Relief 680mg/80mg/25mg Chewable Tablets — Current selected SmPCemc · Summary of Product Characteristics
General medicine information. Follow the instructions for your own medicine and speak to a pharmacist or clinician about your individual circumstances.