Active substance

Bismuth Subsalicylate + Calcium Carbonate

3 products from 3 companies contain this in Canada.

3 without prescriptiontablet (chewable)

Available without a prescription

BISMUTH TABLETS WITH CALCIUM CARBONATE262 mg + 350 mgWithout prescriptiontablet (chewable) Tanta Pharmaceuticals Inc · Bismuth Subsalicylate + Calcium Carbonate · A02AX CHEWABLE BISMUTH TABLETS WITH CALCIUM CARBONATE262 mg + 350 mgWithout prescriptiontablet (chewable) Cellchem Pharmaceuticals Inc. · Bismuth Subsalicylate + Calcium Carbonate · A02AX STOMACH RELIEF CHEWABLE TABLETS262 mg + 350 mgWithout prescriptiontablet (chewable) Guardian Drug Company Inc · Bismuth Subsalicylate + Calcium Carbonate · A02AX

Same substance is not the same product. Strength, form, release mechanism and other ingredients all differ. Whether one can replace another is a decision for a pharmacist.