Answer
Calcium carbonate can occur in antacids, but this combination product is licensed as a calcium supplement for deficiency and bone-related indications, not indigestion.
Sources for this answer
- Calvive 1000 Effervescent Tablets (formerly Sandocal Tablets) — Current selected SmPCemc · Summary of Product Characteristics
- NHSNHS · NHS medicine guidance
General medicine information. Follow the instructions for your own medicine and speak to a pharmacist or clinician about your individual circumstances.