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Dictionary · Drug

dimenhydrinate

An antihistamine taken to prevent and treat motion sickness, nausea and vertigo.

dy-men-HY-drih-nate nounBeers Criteria

What it means

A first-generation antihistamine related to diphenhydramine. It calms the balance system of the inner ear, so it is used for motion sickness and dizziness. It causes drowsiness and anticholinergic effects such as dry mouth, blurred vision, constipation and trouble passing urine.

For the nurse

For motion sickness, teach the client to take it 30 to 60 minutes before travel, not to drive and to avoid alcohol. The Beers Criteria advise avoiding first-generation antihistamines in older adults because of confusion and falls.

At a glance

Drug classantihistamine (antiemetic, first generation)
Brand namesDramamine
Also writtenDramamine

Related terms

nausea

An uneasy feeling in the stomach with the urge to vomit.

dizziness

A feeling of being lightheaded, unsteady or off balance, or that the room is spinning.

fexofenadine

A second-generation antihistamine taken for seasonal allergies and hives, with little drowsiness.

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