Active substance

Dextromethorphan Hydrobromide + Guaifenesin + Phenylephrine Hydrochloride

2 products from 2 companies contain this in Canada.

2 without prescriptionsyrup

Available without a prescription

COUGH & CONGESTION20 mg + 400 mg + 10 mgWithout prescriptionsyrup Lsl Medplus Inc · Dextromethorphan Hydrobromide + Guaifenesin + Phenylephrine Hydrochloride · R05FA02 DAYQUIL COUGH DM + CONGESTION20 mg + 400 mg + 10 mgWithout prescriptionsyrup Procter & Gamble Inc · Dextromethorphan Hydrobromide + Guaifenesin + Phenylephrine Hydrochloride · R05FA02

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.