Narcolepsy overview

Overview

Narcolepsy is a long-term brain condition that makes it hard for your brain to control your sleep-wake cycle. This means you may feel very sleepy during the day and suddenly fall asleep at times you don’t expect. It can also cause sudden muscle weakness when you feel strong emotions, like laughter or surprise.

Narcolepsy is considered rare. It affects about 1 in 2,000 people, though many cases may go undiagnosed. It is not contagious.

Narcolepsy can affect anyone, but it often starts in childhood or young adulthood. It affects both males and females. People with a family history of narcolepsy may have a slightly higher risk.

Symptoms

Common symptoms

• Excessive daytime sleepiness – feeling very sleepy during the day, even after a full night’s sleep, and struggling to stay awake.
• Cataplexy – sudden muscle weakness triggered by strong emotions like laughter, surprise, or anger. This can range from a slight drooping of the eyelids to a complete collapse.
• Sleep paralysis – being unable to move or speak for a few seconds or minutes when falling asleep or waking up.
• Hallucinations – seeing, hearing, or feeling things that aren’t real, especially when falling asleep or waking up.
• Disrupted night-time sleep – waking up often during the night.

Symptoms in children

• Children may have the same symptoms as adults, but they might be mistaken for attention or behavioural problems.
• They may have trouble concentrating in school, seem overly hyperactive, or have mood swings.
• Cataplexy in children often affects the face and neck, causing drooping eyelids or a slack jaw.

Symptoms in older adults

• Symptoms are similar, but older adults may have other health conditions that make narcolepsy harder to recognise.
• They might attribute sleepiness to ageing or medication side effects.
• The risk of falls during cataplexy may be higher.

Causes

Main causes

• Narcolepsy is usually caused by the brain losing a chemical called hypocretin (also called orexin), which helps keep you awake and controls REM sleep.
• This loss is thought to be due to the body’s immune system mistakenly attacking the cells that produce hypocretin.
• In some cases, the exact cause is unknown.

Risk factors

• Having a family member with narcolepsy (though most cases are not inherited).
• Certain genetic factors, like having a specific gene (HLA-DQB1*0602).
• Infections, such as some strains of the flu or strep throat, may trigger the immune reaction in some people.
• Head injury or brain tumour can, in rare cases, damage the area of the brain that produces hypocretin.

When to see a doctor

See a doctor urgently if:

• If you often fall asleep suddenly during activities like driving or operating machinery, seek medical advice right away to prevent accidents.

Book a routine appointment if:

• If you have been feeling very sleepy during the day for several weeks, even after getting enough sleep at night, talk to your GP.
• If you have episodes of muscle weakness when you laugh or feel strong emotions.
• If you experience sleep paralysis or vivid hallucinations when falling asleep or waking up.

Diagnosis

A sleep specialist will ask about your symptoms, medical history, and sleep habits. They may ask you to keep a sleep diary for a couple of weeks. Diagnosis usually involves monitoring your sleep in a lab.

Tests that may be done

• Polysomnogram (PSG) – an overnight sleep study that records brain waves, heart rate, breathing, and eye/leg movements.
• Multiple Sleep Latency Test (MSLT) – a daytime test that measures how quickly you fall asleep and whether you enter REM sleep quickly (a sign of narcolepsy).
• A lumbar puncture (spinal tap) to measure hypocretin levels in your spinal fluid is sometimes used, but not always.

What to expect at your appointment

The diagnosis process can take a few weeks to complete. It is safe and painless, though the overnight study might feel strange at first. Your doctor will explain the results and work with you on a plan.

Treatment

Narcolepsy cannot be cured, but treatments can help manage symptoms so you can stay active and safe. Treatment is tailored to each person and usually includes a mix of lifestyle changes and medication.

Self-care at home

• Take short, scheduled naps (10–20 minutes) during the day to reduce sleepiness.
• Maintain a regular sleep schedule – go to bed and wake up at the same time every day, even on weekends.
• Avoid caffeine and heavy meals close to bedtime.
• Plan your day to include breaks for rest or naps if needed.
• Let your employer, teachers, or family know about your condition so they can support you.

Medical treatments

Your doctor may prescribe medications to help you stay awake during the day or to manage cataplexy and other symptoms. These include stimulants, medications that promote wakefulness, and medicines that suppress REM sleep. Treatment is always started at a low dose and adjusted carefully. Never stop or change medication without talking to your doctor.

When is surgery considered?

Surgery is not a treatment for narcolepsy. There are no surgical procedures to correct the underlying problem.

Living with this condition

Living with narcolepsy means learning to work with your body’s sleep needs. Most people find that a combination of naps, a steady routine, and medication keeps them safe and productive. You can still drive, work, and enjoy hobbies, but you must follow safety rules – such as not driving when sleepy.

Lifestyle tips

• Stick to a regular sleep-wake schedule.
• Take planned naps at the same times each day.
• Avoid alcohol and recreational drugs, as they can worsen symptoms.
• Manage stress with relaxation techniques like deep breathing or mindfulness.
• Join a support group to connect with others who understand.

Diet and exercise

A balanced diet and regular exercise can improve your overall energy and sleep quality. Avoid large, heavy meals before bed. Gentle exercise, like walking or yoga, can help you stay alert during the day without overstimulating you.

Mental health and emotional wellbeing

Narcolepsy can be frustrating and affect your mood, confidence, and social life. It is common to feel anxious or depressed. Talking to a counsellor or therapist can help. If you are struggling, reach out to your doctor or a mental health professional – you deserve support.

Prevention

There is no known way to prevent narcolepsy because it is caused by a change in the immune system that is not fully understood. However, recognising symptoms early and getting treatment can prevent complications like accidents.

Vaccines

No vaccine prevents narcolepsy. One type of swine flu vaccine used in 2009–2010 was linked to a very small increase in risk, but that vaccine is no longer in use. Routine vaccinations are safe for people with narcolepsy.

Screening programmes

There is no routine screening for narcolepsy in the general population. If you have symptoms, talk to your doctor about being referred to a sleep specialist.

Complications

If left untreated

• Higher risk of accidents, such as car crashes or workplace injuries, due to sudden sleep attacks.
• Difficulty performing well at school or work, which can affect your career and finances.
• Social isolation or relationship problems because others may not understand your symptoms.
• Increased risk of depression and anxiety.

Long-term outlook

With the right treatment and lifestyle adjustments, most people with narcolepsy lead full and productive lives. Symptoms often stabilise over time and do not usually get worse. While narcolepsy is a lifelong condition, you can learn to manage it and still do the things that matter to you.

Find support

International organisations

• World Sleep Society ↗

External links open third-party websites. Ruqelo Health is not responsible for external content. Listing an organisation does not imply endorsement.