People tired due to narcolepsy symptoms 2

“What is EDS, and why am I always so tired?”

How narcolepsy patients experience excessive daytime sleepiness (EDS).

EDS is the cardinal symptom of narcolepsy.1

  • EDS is also often the most disabling symptom.1
    • Characterized by the inability to stay awake and alert during the day, resulting in periods of the irrepressible need for sleep or unintended lapses into drowsiness or sleep.1

EDS can affect narcolepsy patients in many ways.1,2

  • Periods of sleep can occur at any time.1,2
    • Most patients fall asleep about 3 to 5 times per day.3
    • Sleep can last anywhere from a few seconds, to several minutes, and even several hours.2,3
    • Sleep is more likely to occur in monotonous situations but also occurs during those requiring physically active participation.1,3,4

Typical times when sleep can occur.

Sleep can occur while...1-5

Sitting and watching television


Attending class at school

Attending a lecture

Having a conversation

Playing a game

Eating a meal

Riding as a passenger in a car

Driving or operating other types of machinery

Find out how patients and caregivers describe their experiences with EDS.