Active substance

Acetaminophen and Diphenhydramine Citrate

2 products from 2 companies contain this in United States.

2 without prescriptionTabletPowder

Available without a prescription

Acetaminophen and Diphenhydramine Citrate500 mg + 38 mgWithout prescriptionTablet InvaTech Pharma Solutions LLC · Acetaminophen and Diphenhydramine Citrate Goodys Pm500 mg + 38 mgWithout prescriptionPowder Medtech Products Inc. · Acetaminophen and Diphenhydramine Citrate

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.