Diphenhydramine HCl, commonly known as Benadryl, is an antihistamine used to treat sneezing, runny nose and red, irritated, itchy or watery eyes caused by hay fever, allergies or the common cold. It is sometimes used to ... More »

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Patients frequently report side effects related to the nervous system, such as sedation, drowsiness and depression, after using diphenhydramine hydrochloride, states Drugs.com. Other dangers include dystonic reactions, d... More »

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While diphenhydramine is commonly utilized as an antihistamine medication to treat symptoms of nasal allergies and colds, the medication is also a common ingredient in sleep aid products because it causes drowsiness and ... More »

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Benadryl is the brand name for diphenhydramine, an antihistamine used to alleviate symptoms of sneezing, runny nose, cough and watery eyes that accompany the common cold, allergies and hay fever. It is combined with pain... More »

ZzzQuil works, according to Drugs.com; its active ingredient is diphenhydramine, which is an antihistamine used to treat cold and allergy symptoms such as sneezing, itching, watery eyes and runny nose. It is also helpful... More »

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According to WebMD, hydroxyzine HCl is an oral antihistamine used to treat itching caused by allergic reactions. The medicine works by blocking the production of histamine the body makes in response to an allergic reacti... More »

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Pseudoephedrine HCl is a decongestant used to treat nasal symptoms associated with allergies or the common cold, explains WebMD. It is sold under the brand names Afrin, Dimetapp, Drixoral and Sudafed. Common side effects... More »

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