Sleep paralysis is a feeling of being awake but not being able to move. It happens when a person goes from being awake to being asleep. Some people can't move or speak during these changes. The pressure or sense of being choked may also happen to people who don't know what to do. who hasn't had enough sleep. The person has good problem-solving skills. Artvigil 150 is used to help people who have a lot of sleepiness during the day (narcolepsy). It makes you more alert and helps you get back to a normal sleep cycle.