Narcolepsy is a chronic neurological disorder of excessivedaytime sleepiness. It may occur with other symptomssuch as cataplexy, sleep paralysis and hallucinations.• All people with narcolepsy have excessive drowsiness.You may have a lack of energy.Strong urges to napcan happen at any time of the day.Naps might last forminutes or up to an hour or more.arcolepsy is a chronic neurological disorder of excessivedaytime sleepiness. It may occur with other symptomssuch as cataplexy, sleep paralysis and hallucinations.• All people with narcolepsy have excessive drowsiness.You may have a lack of energy.