Abstract Narcolepsy is a complex sleep disorder that causes excessive daytime sleepiness and sudden sleep attacks. It’s caused by a deficiency in a neurotransmitter called hypocretin, which regulates wakefulness. Narcolepsy also includes symptoms like cataplexy, sleep paralysis, and hallucinations. The root cause is the loss or dysfunction of hypocretin-producing neurons in the brain. Despite being misunderstood, recognizing the symptoms of excessive daytime sleepiness is crucial for identi...