Quick Answer
Narcolepsy affects ~1 in 2,000 people — excessive daytime sleepiness, sleep attacks and cataplexy. It's diagnosable and treatable.
Medically reviewed by Dr. Jitendra Prasad Yadav • NMC 8029 • Kathmandu Neurology Clinic & Cognitive Center
Narcolepsy is a chronic neurological disorder of sleep-wake regulation caused by loss of hypocretin (orexin) neurons in the hypothalamus. It causes overwhelming daytime sleepiness with irresistible sleep attacks, and in ~70% of cases, cataplexy — sudden loss of muscle tone triggered by strong emotions (laughter, anger, surprise).
The two types
Type 1 (narcolepsy with cataplexy): low hypocretin levels, cataplexy present. Type 2 (without cataplexy): normal hypocretin, no cataplexy. Both cause excessive daytime sleepiness and disrupted nighttime sleep.
Diagnosis
Overnight polysomnography followed by Multiple Sleep Latency Test (MSLТ) showing short sleep latency and sleep-onset REM periods. HLA-DQB1*06:02 genetic marker supports diagnosis. CSF hypocretin-1 measurement confirms Type 1 when available.
Treatment
Stimulants (modafinil, armodafinil, methylphenidate) for daytime sleepiness. Sodium oxybate for cataplexy and nighttime sleep. Antidepressants (SSRIs, SNRIs, TCAs) for cataplexy. Scheduled naps help. Lifestyle: consistent sleep schedule, avoid alcohol/sedatives, safety precautions for driving.
When to seek professional evaluation
Narcolepsy requires specialist evaluation with sleep studies — excessive daytime sleepiness has many causes and accurate diagnosis guides treatment.
This guide is educational and does not replace individual medical advice.
Frequently asked questions
Answers reviewed by Dr. Jitendra Prasad Yadav • MBBS, MD (Internal Medicine), FICN (Neurology), FCNV, FIHM • NMC 8029
Yes — sleep deprivation and apnea frequently increase migraine/chronic headache frequency.
Sleep deprivation lowers seizure threshold in susceptible individuals.
Migraine is a neurological condition; headache is one feature. Associated symptoms and functional impact are important for diagnosis.
Aura refers to visual, sensory, or speech symptoms that precede the headache in some people. Both types are migraine; the presence of aura may influence management discussion.
More: All FAQs → · Ask Dr. Jitendra →
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References & Review
Reviewed by Dr. Jitendra Prasad Yadav • Last reviewed: 2026-11-10
- International Classification of Headache Disorders, 3rd edition (ICHD-3).
- Harrison's Principles of Internal Medicine — Neurology sections.
- American Academy of Neurology guidelines for selected conditions (where applicable).
Content is educational and aligns with standard medical references; individual evaluation may vary. External links provide context and do not imply endorsement.