People with narcolepsy experience the irresistible need to sleep, regardless of how much sleep they get at night.
Oftentimes, they fall asleep at inappropriate times, like during conversation, while working or driving a car. These “attacks” of sleep may last from 30 seconds to 30 minutes. Some people with narcolepsy may have a symptom called cataplexy. This is a sudden decrease in muscle control, which is associated with periods of strong emotions, like laughter, surprise or anger.