Narcolepsy is a condition that causes patients to fall asleep uncontrollably throughout the day for periods lasting less than a minute to more than half an hour. These “sleep attacks” occur even after getting enough sleep at night. The unusual sleep pattern that people with narcolepsy have can affect their schooling, work, and social life. Falling asleep during activities like walking; driving, cooking, or talking can have dangerous results, both professionally and personally. People with narcolepsy may also have one or more of the following signs and symptoms : -Sudden loss of muscle tone and control (muscle weakness) over parts or all of the body while awake (cataplexy)Sudden inability to move or speak while falling asleep or waking up (sleep paralysis)Vivid dreams while falling asleep or waking up (hallucinations