Narcolepsy is a chronic neurological disorder that affects the brain’s ability to regulate sleep-wake cycles. People with narcolepsy often experience excessive daytime sleepiness and may fall asleep suddenly, even during active tasks like talking or driving. The condition can also include symptoms like cataplexy (sudden loss of muscle tone), sleep paralysis, and hallucinations when falling asleep or waking up. Narcolepsy typically begins between the ages of 10 and 30 and lasts a lifetime. While there’s no cure, proper treatment and lifestyle adjustments can significantly reduce symptoms and improve quality of life.