Learn what cataplexy is, how it can present, why it matters in narcolepsy type 1 and when a specialist sleep assessment may be appropriate.
Medical information reviewed in the context of the Sleep Lab by Dr Omar Laraqui Hossini. This page is educational and does not replace an individual medical assessment.
Cataplexy is a sudden episode of muscle weakness or loss of muscle tone, often triggered by emotions such as laughter, surprise or excitement. Episodes can be subtle, for example jaw weakness or head dropping, or more extensive.
Unlike fainting or many seizure events, a person with cataplexy is typically conscious during the episode. Because several conditions can look similar, the description and context of an event should be reviewed carefully by a clinician.
Cataplexy is strongly associated with narcolepsy type 1. It may appear after excessive daytime sleepiness has already begun, so the timing of symptoms is important during the clinical interview.
Seek specialist assessment if episodes of sudden weakness occur together with persistent daytime sleepiness, irresistible sleep episodes, sleep paralysis or vivid sleep-related hallucinations.
If you are concerned about narcolepsy, hypersomnia or persistent daytime sleepiness, you can begin with an online consultation. Testing in Casablanca is arranged only when clinically indicated.
For emergencies or urgent symptoms, contact local emergency or medical services rather than using the online appointment form.