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Insomnia

Medical term · I

The inability to fall asleep or remain asleep long enough to feel rested.

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Related terms

Rebound insomnia

Insomnia caused by withdrawal from sleep medication; usually it is at least as serious as before the medication was used.
Upper airway resistance syndrome

Inhalation that requires undue extra exertion; this extra work may cause insomnia and daytime sleepiness.
Inoperable

A condition that cannot be treated by surgery.

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