Drowsiness refers to feeling abnormally sleepy during the day. People who are drowsy may fall asleep in inappropriate situations or at inappropriate times.
See also:
Sleepiness - during the day; Hypersomnia; Somnolence
Excessive daytime sleepiness (without a known cause) suggests that you have a significant sleep disorder. It is different from
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Source: ADAM Encyclopedia
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Source: ADAM Encyclopedia
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