Active substance

Dextromethorphan Hydrobromide + Doxylamine Succinate + Pseudoephedrine Hydrochloride + Acetaminophen

2 products from 2 companies contain this in Canada.

2 without prescriptionsyrupliquid

Available without a prescription

NICOLD MEDICINE FOR ADULTS30 mg + 12.5 mg + 60 mg + 1000 mgWithout prescriptionsyrup Tanta Pharmaceuticals Inc · Dextromethorphan Hydrobromide + Doxylamine Succinate + Pseudoephedrine Hydrochloride + Acetaminophen · N02BE51 NITETIME COLD MEDICINE30 mg + 7.5 mg + 60 mg + 1000 mgWithout prescriptionliquid Jamp Pharma Corporation · Dextromethorphan Hydrobromide + Doxylamine Succinate + Pseudoephedrine Hydrochloride + Acetaminophen · N02BE51

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.