Modafinil, sold under the brand name Provigil among others, is a central nervous system stimulant medication used to treat narcolepsy, sleep apnea, and shift worksleepdisorder. It is taken by mouth. Modafinilis a first-line treatment for narcolepsy in the United States and Europe. Modafiniltabletsare a prescription medicine used to improve wakefulness in adults who are very sleepy due to one of the following diagnosed sleepdisorders: narcolepsy. obstructive sleep apnea (OSA). Modafiniltabletsare used with other medical treatments for this sleepdisorder. Whatismodafinil?Take modafinil in the morning (when you wake up) if you suffer from daytime sleepiness due to narcolepsy or OSA. Take modafinil 1 hour before the start of a work shift if you are taking it to treat work-time sleepdisorders. You may take the tablet with or without food. Modafinilworks by affecting brain chemicals to increase wakefulness and alertness. This helps alleviate symptoms related to certain sleepdisorders and mental health conditions. Howdoesmodafinilwork (mechanism of action)? It is not clear exactly howmodafinilworks to improve sleep cycles to help with obstructive sleep apnea, narcolepsy, or shift workdisorder.Howismodafinil supplied (dosage forms)? Brands and other names. Modafinilworks in the following waysModafinilis administered in the following ways: Modafinilis available in tablet form for oral consumption.