Narcolepsy is a neurological sleep disorder that affects the part of the brain that tells you when to fall asleep. So instead of falling asleep when you’re supposed to, you find yourself falling asleep at different times of day for no apparent reason like driving, cooking dinner or in the drive-up window at Taco Bell. It is believed that narcolepsy disorder is a genetic disorder. Narcolepsy is a lifelong condition, but with changes in life style and medical help symptoms can be reduced.