OTC

Antihistamine and Expectorant (Cough medicine)

Diphenhydramine HCl; Ammonium chloride

Last reviewed April 2026

Who is this for?

What is this drug?

This is a combination medicine containing diphenhydramine (an antihistamine that stops coughs and reduces allergic reactions) and ammonium chloride (an expectorant that helps loosen thick mucus so you can cough it out more easily). Together, they relieve cough and clear your chest.

What is it used for?

Coughchesty cough with mucus (phlegm)dry irritating coughcommon cold symptomsrunny nosesneezingallergic cough

Available Over The Counter

Available at pharmacies without a prescription. Rules may vary by country.

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