Somnolence (Drowsiness)

Somnolence is the state of feeling drowsy or falling asleep for long periods of time. Drowsiness is a common condition and can be caused by many things, including:

• Fever
• Medications and medical treatments
• Depression
• Many medical conditions including diabetes, epilepsy, hypothyroidism, fibromyalgia, anemia, chronic fatigue syndrome and Lyme disease
• Hormonal changes

Daytime drowsiness is also a complication of sleep disorders such as:

• Insomnia
• Sleep apnea
• Delayed sleep phase syndrome
• Restless legs syndrome
• Periodic limb movement disorder

Somnolence can make tasks like driving or operating machinery difficult, putting the person at risk for accidents.

Excessive Daytime Somnolence (EDS)

While everyone experiences drowsiness from time to time, excessive daytime somnolence (EDS) affects about 16% of men and 22% of women. Some of the risk factors associated with this chronic condition include:

• Working irregular hours
• Night shift work
• Poor sleep
• Sleep disorders

EDS can occur even if a person has seemingly had enough sleep the night before. The person feels the need to nap repeatedly during the day. Sleep researchers have developed several screening tools that can help diagnose EDS.

If you are concerned that you or a loved one may have excessive daytime somnolence, consult with your doctor or visit a sleep center for professional diagnosis and treatment.

Disclaimer: These statements and products are not intended to diagnose, treat and cure or prevent disease. Always consult your physician regarding any sleeping disorders.