Diphenhydramine and dextromethorphan are common active ingredients found in various over-the-counter (OTC) cold medications.
### Medications Containing Diphenhydramine
Diphenhydramine is an antihistamine often used for its sedative properties, as well as for treating symptoms of allergies and the common cold. Some cold and allergy medications containing diphenhydramine include:
1. **Benadryl** – Primarily an allergy medication, but can help


