Active substance

Acetaminophen + Dextromethorphan Hydrobromide + Pseudoephedrine Hydrochloride + Doxylamine Succinate

4 products from 3 companies contain this in Canada.

4 without prescriptioncapsule

Available without a prescription

BUCKLEY'S COMPLETE NIGHTTIME SOFTGELS325 mg + 15 mg + 30 mg + 6.25 mgWithout prescriptioncapsule Haleon Canada Ulc · Acetaminophen + Dextromethorphan Hydrobromide + Pseudoephedrine Hydrochloride + Doxylamine Succinate · N02BE51 NIGHTTIME COLD & SINUS325 mg + 15 mg + 30 mg + 6.25 mgWithout prescriptioncapsule Apotex Inc · Acetaminophen + Dextromethorphan Hydrobromide + Pseudoephedrine Hydrochloride + Doxylamine Succinate · N02BE51 NIGHTTIME RELIEF COMPLETE325 mg + 15 mg + 30 mg + 6.25 mgWithout prescriptioncapsule Apotex Inc · Acetaminophen + Dextromethorphan Hydrobromide + Pseudoephedrine Hydrochloride + Doxylamine Succinate · N02BE51 NYQUIL PLATINUM COLD & FLU + CONGESTION EXTRA STRENGTH LIQUICAPS500 mg + 15 mg + 30 mg + 6.25 mgWithout prescriptioncapsule Procter & Gamble Inc · Acetaminophen + Dextromethorphan Hydrobromide + Pseudoephedrine Hydrochloride + Doxylamine Succinate · 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.