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diphenhydramine
(di″fen-hiĀ“drә-mēn)
an antihistamine with anticholinergic effects; the hydrochloride salt is used for relief of allergic symptoms, for treatment of anaphylaxis, parkinsonism, and motion sickness or other causes of nausea, vomiting, or vertigo, and as an antitussive; administered orally, intramuscularly, or intravenously. The hydrochloride and citrate salts are used as sedatives and hypnotics and as ingredients in cough and cold preparations; administered orally.

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