All Diseases

Narcolepsy

Last Updated: July 3, 2026

Key Points

  • Rare, long-term brain condition
  • Brain cannot regulate sleep-wake patterns normally
  • Causes excessive daytime sleepiness and sudden sleep attacks
  • Often linked to a lack of the brain chemical hypocretin

Overview

Narcolepsy is a rare, long-term brain condition that disrupts the body's natural sleep-wake cycle. It prevents individuals from controlling when they wake or sleep, leading to significant challenges in daily life. This condition is often caused by a lack of hypocretin, a brain chemical that regulates wakefulness. This deficiency is thought to result from the immune system mistakenly attacking the cells that produce it. However, other factors like hormonal changes, stress, or infections can also play a role. While there's no cure, narcolepsy can be managed through lifestyle adjustments, such as scheduled naps and strict bedtime routines, and sometimes medication. Early diagnosis and management are key to minimizing its impact.

Signs and Symptoms

  • Excessive daytime sleepiness
  • Sudden sleep attacks
  • Cataplexy (temporary muscle weakness)
  • Sleep paralysis
  • Excessive dreaming and night waking

Things That Increase the Risk

  • Lack of hypocretin (orexin) in the brain
  • Immune system attacking hypocretin-producing cells
  • Hormonal changes (e.g., puberty, menopause)
  • Major psychological stress
  • Certain infections (e.g., swine flu)

Diagnosis

  • GP assessment of sleep habits and symptoms
  • Tests to rule out other conditions like sleep apnoea or thyroid issues
  • Referral to a sleep disorder specialist
  • Overnight sleep study in a specialist center

Treatment & Management

  • Taking frequent, brief naps throughout the day
  • Maintaining a strict bedtime routine
  • Prescribed medications to reduce daytime sleepiness
  • Medications to prevent cataplexy attacks

Prevention

  • Maintain a regular sleep schedule
  • Take scheduled daytime naps
  • Avoid emotional triggers for cataplexy
  • Seek early medical consultation for symptoms

Available Treatments

Explore our range of treatment options for Narcolepsy:

Quick Info

Affects

Brain's sleep-wake regulation

Prevalence

About 30,000 people in the UK

Diagnosis

Sleep study

Treatment

Lifestyle changes, medication

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