My usual symptoms were extreme tiredness to the point I was convinced I had narcolepsy.
Malfunction of the orexin system causes narcolepsy in mice, rats, dogs and humans.
Stimulants, which are often prescribed to treat the sleep disorder narcolepsy and attention deficit hyperactivity disorder, produce feelings of alertness and increased energy.
Diagnostic Daytime Multiple Sleep Latency Test: Doctors who believe a person is suffering from narcolepsy may request this test.
The causes of narcolepsy are not fully known.