Glossary

narcolepsy

Narcolepsy is a long-lasting (chronic) hypersomnia sleep disorder of the brain (neurologic disorder). It affects the brain’s ability to control sleep and wakefulness. There are 2 types of narcolepsy:

• Narcolepsy type 1 (NT1) with cataplexy or low orexin levels
• Narcolepsy type 2 (NT2) without cataplexy

The most common symptoms of NT1 are:

• Excessive daytime sleepiness (EDS)
• Cataplexy
• Disrupted nighttime sleep
• Needed naps
• Sleep-related hallucinations
• Sleep paralysis
• Brain fog

NT2 symptoms may include any of the NT1 symptoms except cataplexy. NT2 symptoms may also overlap with symptoms of idiopathic hypersomnia, such as severe sleep inertia and long sleep.

Read more on our web pages:

• Narcolepsy type 1
• Narcolepsy type 2