Narcolepsy is characterized by excessive daytime sleepiness. The classic form of narcolepsy (narcolepsy type 1) features cataplexy, sleep paralysis, and hypnagogic hallucinations, in addition to excessive daytime sleepiness. Some patients with otherwise typical features of narcolepsy do not have cataplexy; this is a condition referred to as monosymptomatic narcolepsy or narcolepsy without cataplexy (narcolepsy type 2).
Apr. 11, 2021