Narcolepsy

Overview

Narcolepsy is a long-term brain disorder that affects your sleep-wake cycle. People with narcolepsy have extreme sleepiness during the day and may suddenly fall asleep at unexpected times, even after a full night's sleep. It happens because the brain has trouble controlling when you are awake and when you are asleep.

Narcolepsy is considered rare. It affects about 1 in 2,000 people worldwide. Many cases may be undiagnosed because symptoms can be mistaken for other conditions.

Narcolepsy can start at any age, but it often begins in teenagers or young adults. It affects both men and women. It is not contagious and cannot be passed from person to person.

Symptoms

Common symptoms

• Extreme daytime sleepiness — feeling very tired and struggling to stay awake during the day, even after sleeping well at night.
• Cataplexy — sudden, brief muscle weakness triggered by strong emotions like laughter, surprise, or anger. You might feel your knees buckle, your head drop, or your face go limp.
• Sleep paralysis — being unable to move or speak for a few seconds or minutes just as you are falling asleep or waking up.
• Hallucinations — seeing, hearing, or feeling things that are not real, especially when falling asleep or waking up.
• Nighttime sleep problems — waking up frequently during the night, sometimes with vivid dreams or nightmares.

Symptoms in children

• Children with narcolepsy may have extreme tiredness that affects schoolwork and play.
• They might have trouble paying attention or be misdiagnosed with ADHD or learning difficulties.
• Cataplexy in children can look like an unusual stumble or a sudden, brief loss of facial expression.
• Behaviour changes, such as irritability or hyperactivity, can also occur.

Symptoms in older adults

• In older adults, narcolepsy may be harder to spot because daytime sleepiness can be blamed on ageing or other health conditions.
• Cataplexy might be less noticeable or mistaken for a balance problem.
• Older adults may also have other sleep disorders, like sleep apnoea, which can make narcolepsy symptoms worse.

Causes

Main causes

• Most cases of narcolepsy with cataplexy are caused by the loss of a chemical in the brain called hypocretin (also called orexin), which normally helps keep you awake.
• The loss of hypocretin is thought to happen because the immune system mistakenly attacks the cells that produce it (an autoimmune response).
• Genetics may play a role — certain genes can make a person more likely to develop narcolepsy.
• Some cases are linked to a trigger, such as a viral infection or head injury, though this is not fully understood.

Risk factors

• Having a close family member with narcolepsy increases your risk slightly.
• Certain infections, like the flu or streptococcal infections, might trigger the immune response in some people.
• Age — symptoms often start between ages 10 and 30.

When to see a doctor

See a doctor urgently if:

• If you have sudden muscle weakness (cataplexy) that causes you to fall and injure yourself.
• If your daytime sleepiness makes it dangerous to drive or operate machinery.

Book a routine appointment if:

• If you feel extremely tired during the day most of the time, even after getting enough sleep, and it affects your daily life.
• If you have episodes of muscle weakness or unusual experiences when falling asleep or waking up.

Diagnosis

A doctor, often a sleep specialist (neurologist), will take a detailed history of your symptoms and sleep habits. There is no single test for narcolepsy, so the diagnosis is based on a combination of tests and your symptom story.

Tests that may be done

• Sleep diary — you may be asked to record your sleep and wake times for a week or two.
• Actigraphy — wearing a small device on your wrist that tracks your sleep patterns at home.
• Polysomnography — an overnight sleep study in a lab that measures brain waves, eye movements, breathing, and muscle activity.
• Multiple Sleep Latency Test (MSLT) — a test the next day where you take several short naps to see how quickly you fall asleep and whether you enter REM sleep quickly.

What to expect at your appointment

The diagnostic process can take a few weeks. You may need to stop certain medications before the tests. No tests are painful, and you will be guided every step of the way. Once diagnosed, your doctor will discuss treatment options and support.

Treatment

Narcolepsy has no cure, but treatment can help control symptoms and improve quality of life. Treatment is usually tailored to each person and may include lifestyle changes, medication, and support. Always work with a healthcare provider to find the right approach for you.

Self-care at home

• Take short, planned naps (10–20 minutes) during the day to help manage sleepiness.
• Keep a consistent sleep schedule — go to bed and wake up at the same time every day, including weekends.
• Avoid alcohol and caffeine in the evening, as they can disrupt sleep.
• Stay active during the day with regular exercise, but avoid intense activity close to bedtime.
• Talk to your employer or school about your condition — many places offer flexible schedules or rest breaks.

Medical treatments

Medical treatment for narcolepsy focuses on managing daytime sleepiness and other symptoms. Doctors may prescribe medicines that promote wakefulness, such as certain stimulants, or medications that reduce cataplexy and other REM sleep symptoms. Some medicines are taken daily, while others are used only before activities that require alertness. Your doctor will explain the options, possible side effects, and how to take them safely. Avoid any over-the-counter sleep aids without talking to your doctor first.

When is surgery considered?

Surgery is not used to treat narcolepsy.

Living with this condition

Living with narcolepsy means managing sleepiness and other symptoms while staying as active and independent as possible. Planning your day around naps, telling trusted people about your condition, and using strategies to stay alert (like standing up or walking around) can make a big difference. It is also important to follow your treatment plan and attend regular check-ups.

Lifestyle tips

• Plan your schedule to include one or two short naps at set times.
• Avoid driving if you feel sleepy — arrange alternative transport or take a nap before driving.
• Create a relaxing bedtime routine to improve nighttime sleep.
• Wear a medical alert bracelet or carry an ID card that explains your condition in case of an emergency.

Diet and exercise

A balanced diet and regular exercise can help maintain energy levels. Try to eat small, frequent meals to avoid heaviness after eating. Light to moderate exercise, like walking or swimming, during the day can improve nighttime sleep quality. Avoid large meals close to bedtime.

Mental health and emotional wellbeing

Narcolepsy can affect your mood, confidence, and social life. It is common to feel frustrated, embarrassed, or anxious about symptoms like falling asleep unexpectedly or having cataplexy in public. If you notice changes in your mood or feel low, talk to your doctor or a mental health professional. Remember, you are not alone and support is available.

Prevention

There is no known way to prevent narcolepsy because the exact cause is not fully understood. However, getting enough sleep, managing stress, and avoiding triggers (like infections) might help reduce the risk of developing symptoms or making them worse.

Vaccines

There is no vaccine to prevent narcolepsy. Some past influenza vaccines were linked to a small increase in narcolepsy risk in certain countries, but this is not a factor with current vaccines. Speak to your doctor if you have concerns about vaccinations.

Screening programmes

There is no routine screening for narcolepsy in the general population. If you have symptoms, talk to your doctor.

Complications

If left untreated

• Untreated narcolepsy can lead to accidents while driving or at work due to sudden sleep attacks.
• It can affect your relationships, school performance, and job opportunities.
• Chronic sleepiness can increase the risk of depression and anxiety.
• Cataplexy may cause injury if you fall suddenly.

Long-term outlook

With proper treatment and lifestyle changes, most people with narcolepsy can lead full, productive lives. Symptoms may improve over time, but they usually do not disappear completely. Staying engaged with your healthcare team, building a good support network, and learning to adapt to your body's needs are key to feeling your best. Research continues, and new treatments are being developed.

Find support

International organisations

• World Sleep Society ↗
• European Narcolepsy Alliance ↗

Local organisations

• Narcolepsy UK ↗ · United Kingdom
• Narcolepsy Network (USA) ↗ · United States
• Hypersomnia Foundation ↗ · International

Helplines

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