Active substance

Acetaminophen and Guaifenesin

2 products from 2 companies contain this in United States.

2 without prescriptionGranuleCapsule, Liquid Filled

Available without a prescription

Mucinex Childrens Mini Melts Cold and Flu162.5 mg + 100 mgWithout prescriptionGranule Reckitt Benckiser LLC · Acetaminophen and Guaifenesin Mucinex Sinus Max Clear and Cool325 mg + 200 mgWithout prescriptionCapsule, Liquid Filled RB Health (US) LLC · Acetaminophen and Guaifenesin

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.