Narcolepsy is a serious sleep disorder and the number one use for Provigil. A narcoleptic person can fall asleep at any time and any place without any warning. This sudden sleep can be extremely dangerous, even fatal in some situations, especially those that involve activities that require a lot of focus such as driving a motor vehicle or operating equipment or machinery. Provigil can reduce the number of narcoleptic episodes in most people who suffer from this condition and completely eliminate them in many.
Those people forced to work jobs at night or on other non-traditional schedules may suffer from a condition known as shift work sleep disorder. This condition causes sleep patterns to get distorted so that a person has trouble staying awake at work as well as trouble sleeping when at home. By helping these people to stake awake when it is necessary, Provigil also allows them to sleep when downtime is available for doing so. In this manner, the sleep pattern can be reset so that a regular schedule can be maintained without the need for other medications.