Active substance

Acetaminophen, Dextromethorphan Hbr, Guaifenesin, Phenylephrine Hci

3 products from 2 companies contain this in United States.

3 without prescriptionSolutionTabletLiquid

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.