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Somnolence

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Updated April 28, 2009

Definition:
Somnolence is a state of sleepiness close to falling asleep. Many psychiatric medications (and many non-psychiatric medications, too) can cause somnolence, which is one reason why there are so many warnings about not driving or operating heavy machinery until you know how a medicine will affect you.

If you are concerned that one of the medications you, a loved one or friend are taking, or want to know whether a medication under consideration can cause somnolence, visit our Side Effects Library.

Adjective: somnolent

Pronunciation: SAHM-no-lent
Also Known As: Drowsiness
Common Misspellings: somnelence, somnolance, somnelance
Examples:
Gerry had found that eating a heavy meal at lunch often made him somnolent when he went back to his desk.

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