People with this disorder are often excessively sleepy. Taking a short nap may help alleviate the sleepiness for a short while, but often the sleepiness returns after two - three hours.

Sometimes people can have sleep attacks, meaning they can fall asleep while walking, eating, talking, and driving. They may experience muscle weakness during times of strong emotions. Some of the symptoms are listed below.

» Feeling of not being able to move (paralysis) when falling asleep or waking
» Seeing things that are not there or feeling like someone is in the room with you (if alone).
» Frequently waking up and difficulty falling back to sleep
» Memory problems