Active substance

Dextromethorphan Hydrobromide + Phenylephrine Hydrochloride + Acetaminophen

2 products from 2 companies contain this in Canada.

2 without prescriptioncapsule

Available without a prescription

DAYTIME COLD & FLU RELIEF10 mg + 5 mg + 325 mgWithout prescriptioncapsule Apotex Inc · Dextromethorphan Hydrobromide + Phenylephrine Hydrochloride + Acetaminophen · N02BE51 VICKS DAYQUIL COLD & FLU MULTI-SYMPTOM RELIEF LIQUICAPS10 mg + 5 mg + 325 mgWithout prescriptioncapsule Procter & Gamble Inc · Dextromethorphan Hydrobromide + Phenylephrine 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.