Understand the main clinical distinction between narcolepsy type 1 and type 2, including the role of cataplexy, hypocretin and specialist sleep assessment.
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.
Narcolepsy type 1 is generally associated with cataplexy and/or evidence of very low hypocretin (orexin) levels. Cataplexy is a sudden, brief loss of muscle tone that can be triggered by strong emotion while awareness is usually preserved.
Narcolepsy type 2 is diagnosed when narcolepsy is supported by the clinical picture and sleep testing but cataplexy is absent and hypocretin deficiency has not been demonstrated. Symptoms can still be highly disruptive.
The classification helps the sleep specialist interpret symptoms and test results. Diagnosis should not be based on a single symptom or an online checklist; it requires a complete clinical assessment and, when indicated, objective sleep testing.
A sleep specialist reviews sleep history, medicines, sleep schedule and possible alternative causes of excessive sleepiness. Overnight polysomnography and an MSLT may be used when clinically appropriate.
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.