The classic symptoms of the disorder, often referred to as the tetrad of narcolepsy, are cataplexy, sleep paralysis, hypnagogic hallucinations, and excessive daytime sleepiness. 
Narcolepsy is a neurological disorder that affects the control of sleep and wakefulness. People with narcolepsy experience excessive daytime sleepiness and intermittent, uncontrollable episodes of falling asleep during the daytime. These sudden sleep attacks may occur during any type of activity at any time of the day. The four major signs and symptoms of narcolepsy are extreme daytime sleepiness, cataplexy (muscle weakness) while awake, and hallucinations and sleep paralysis during sleep. If you have narcolepsy, you may have one or more of these symptoms. They can range from mild to severe. The most common major symptom, other than excessive daytime sleepiness (EDS), is cataplexy, which occurs in about 70 percent of all people with narcolepsy. Sleep paralysis and hallucinations are somewhat less common. Excessive Daytime Drowsiness is usually the first symptom of narcolepsy. It causes problems functioning on the job and elsewhere. Sudden loss of muscle tone, also known as cataplexy, can be triggered by intense emotions. These may include excitement, laughter, anger, or fear. Only about 20 to 25 percent of people with narcolepsy experience all four symptoms. The excessive daytime sleepiness generally persists throughout life, but sleep paralysis and hypnagogic hallucinations may not. The classic symptoms of the disorder, often referred to as the tetrad of narcolepsy, are cataplexy, sleep paralysis, hypnagogic hallucinations, and excessive daytime sleepiness. Other symptoms may include automatic behaviors and night-time wakefulness. These symptoms may not occur in all patients. Although there is no cure for narcolepsy, the most disabling symptoms of the disorder (EDS and symptoms of abnormal REM sleep, such as cataplexy) can be controlled in most people with drug treatment. Narcolepsy is a chronic disease of the central nervous system. Excessive daytime sleepiness (EDS) is the main symptom and is present in 100% of patients with narcolepsy. Other primary symptoms of narcolepsy include: 1  loss of muscle tone (cataplexy), 2  distorted perceptions (hypnagogic hallucinations), and.
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narcolepsy symptoms