How does narcolepsy with cataplexy differ from narcolepsy without cataplexy?

Reviewed by Yoshinori Abe, MD

Internal Medicine

Narcolepsy is a chronic neurological sleep disorder with two main types. Type 1 narcolepsy (narcolepsy with cataplexy) causes sudden muscle weakness triggered by strong emotions like laughter, surprise, or anger. Type 2 narcolepsy (narcolepsy without cataplexy) shares symptoms like excessive daytime sleepiness but does not include cataplexy episodes.

Understanding which type you may have is key to getting the right treatment—and the fastest way to start is by identifying your symptoms clearly. Take a free, instant, online symptom check to better understand what's going on and confidently plan your next steps.

Reviewed for medical accuracy: 07/14/2026

Important Next Steps

Discover if your symptoms suggest narcolepsy Learn whether daytime sleepiness needs care See if cataplexy could explain episodes Find OTC options for sleepiness relief Find a narcolepsy specialist near you Discover medically valid narcolepsy home remedies Understand what symptoms point to narcolepsy

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Explanation

Narcolepsy is a sleep disorder that makes people very sleepy during the day. It can be divided into two main types: narcolepsy with cataplexy and narcolepsy without cataplexy.

Narcolepsy with Cataplexy

This type includes sudden episodes of muscle weakness, known as cataplexy, which can be triggered by strong emotions like laughter or surprise. These episodes can cause a person to suddenly collapse or become weak but are usually brief.

Narcolepsy without Cataplexy

In this type, people do not experience the sudden muscle weakness. They still have excessive daytime sleepiness but without the cataplexy episodes.

Both types of narcolepsy cause people to feel very sleepy during the day and may disturb their nighttime sleep. The main difference is the presence of cataplexy in one type and its absence in the other. If you're experiencing excessive daytime sleepiness or other unusual symptoms, you can check your symptoms to better understand what might be causing them.

(References)

Dauvilliers Y, Arnulf I, & Mignot E. (2007). Narcolepsy with cataplexy. Lancet (London, England), 17292770.
Dauvilliers Y, & Lopez R. (2016). [NARCOLEPSY WITH CATAPLEXY: TYPE 1 .... La Revue du praticien, 27538328.
Kallweit U, & Bassetti CL. (2017). Pharmacological management of narcolepsy with and .... Expert opinion on pharmacotherapy, 28443381.

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