Diphenhydramine

Diphenhydramine

Diphenhydramine is an antihistamine active ingredient that has a number of different uses in over-the-counter (OTC) medicines. Depending on the dose and form, the active ingredient diphenhydramine can be used to treat hay fever and other allergies, help reduce occasional sleeplessness, or relieve skin irritations and itching. It may be written as diphenhydramine, diphenhydramine hydrochloride […]

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