Active substance

Brompheniramine Maleate, Dextromethorphan Hydrobromide, and Phenylephrine Hydrochloride

2 products from 2 companies contain this in United States.

2 without prescriptionElixirSyrup

Available without a prescription

Dimetapp Cold and Cough1 mg/5mL + 5 mg/5mL + 2.5 mg/5mLWithout prescriptionElixir Foundation Consumer Brands · Brompheniramine Maleate, Dextromethorphan Hydrobromide, and Phenylephrine Hydrochloride Pediacare Childrens Cough and Cold Grape2 mg/10mL + 10 mg/10mL + 5 mg/10mLWithout prescriptionSyrup RANDOB LABS,LTD. DBA CROSSINGWELL CONSUMER HEALTH · Brompheniramine Maleate, Dextromethorphan Hydrobromide, and Phenylephrine Hydrochloride

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.