http://www.wakeupnarcolepsy.org/ Narcolepsy is a Life Changing Diagnosis. Narcolepsy is an autoimmune neurological sleep disorder affecting 1 in 2,000 people. Over 200,000 Americans and 3 million people worldwide have narcolepsy. Narcolepsy is not rare, but severely under-recognized and misdiagnosed as other disorders. It most often presents itself in childhood, adolescence or young adulthood, and lasts a lifetime.