Excessive Daytime Sleepiness (EDS)

Excessive daytime sleepiness (EDS) is a common medical condition characterized by an inability to stay awake and alert during the major waking episodes of the day. It is also known as hypersomnia or somnolence.

Causes

There are several potential causes of excessive daytime sleepiness, including:

  • Sleep disorders such as obstructive sleep apnea (OSA), narcolepsy, and restless leg syndrome
  • Sleep deprivation or insufficient sleep
  • Certain medications, such as sedatives and antidepressants
  • Medical conditions, such as anemia, hypothyroidism, and diabetes
  • Neurological disorders, such as Parkinson's disease and multiple sclerosis
  • Psychiatric conditions, such as depression and anxiety

Symptoms

The primary symptom of excessive daytime sleepiness is a persistent feeling of tiredness or drowsiness during the day, even after getting enough sleep at night. Other symptoms may include:

  • Difficulty concentrating or paying attention
  • Memory problems or difficulty learning new information
  • Mood changes, such as irritability or depression
  • Headaches or muscle pain
  • Increased risk of accidents or errors due to decreased alertness

Diagnosis

Diagnosing excessive daytime sleepiness typically involves a combination of:

  • Medical history and physical examination
  • Sleep diary or actigraphy to monitor sleep patterns
  • Polysomnography (PSG) or other sleep studies to evaluate sleep quality and identify underlying sleep disorders
  • Questionnaires, such as the Epworth Sleepiness Scale (ESS), to assess daytime sleepiness

Treatment

Treatment for excessive daytime sleepiness depends on the underlying cause. Potential treatments may include:

  • Lifestyle changes, such as establishing a regular sleep schedule and improving sleep habits
  • Medications, such as stimulants or wake-promoting agents, to help increase alertness
  • Treatment of underlying medical conditions or sleep disorders
  • Cognitive behavioral therapy (CBT) or other forms of talk therapy to address related mental health concerns

Complications

If left untreated, excessive daytime sleepiness can lead to a range of complications, including:

  • Increased risk of accidents or injuries due to decreased alertness
  • Decreased productivity and performance at work or school
  • Strained relationships with family and friends
  • Worsening of underlying medical conditions or sleep disorders

Article last updated on: 6th June 2025.
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