Active substance

Dextromethorphan Hydrobromide + Pseudoephedrine Hydrochloride + Guaifenesin + Acetaminophen

6 products from 2 companies contain this in Canada.

6 without prescriptiontabletsyrup

Available without a prescription

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.