Drowsiness refers to feeling abnormally sleepy during the day. People who are drowsy may fall asleep in inappropriate situations or at inappropriate times.
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
- Having to work long hours or different shifts (nights, weekends)
- Medications (tranquilizers, sleeping pills, antihistamines)
- Medical conditions (such as
hypothyroidism, hypercalcemia, and hyponatremia/hypernatremia)
- Not sleeping for long enough
- Sleep disorders (such as
sleep apneasyndrome and narcolepsy)
Review Date: 06/01/2009
Reviewed By: Jeffrey Heit, MD, Internist with special emphasis on preventive health, fitness, and nutrition, Philadelphia VA Medical Center, Philadelphia, PA. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.