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The four (4) main symptoms of narcolepsy are:
1. Excessive daytime sleepiness (EDS): uncontrollable sleepiness and/or sleep attacks
2. Cataplexy: a rapidly occurring loss of voluntary muscle tone, usually triggered by strong emotions
3. Hypnagogic hallucinations: intense, vivid, sometimes terrifying experiences which occur at the beginning or end of a sleep period
4. Sleep paralysis: an awareness of one's inability to move despite the desire to do so, occurring as a person is falling asleep or waking up