diphenhydramine(redirected from Insomnal)
Also found in: Dictionary, Thesaurus.
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.
A sedating antihistamine drug, C17H21NO, used usually in the form of its hydrochloride to treat symptoms of colds and allergic conditions, motion sickness, insomnia, and parkinsonism.
BenadrylA proprietary antihistamine developed in the mid-1940s which, like other older sedating agents, has been associated with fatal RTAs/MVAs.
Adverse effects Drowsiness, heartburn, dizziness.