Modafinil reduces extreme sleepiness due to narcolepsy and other sleep disorders, such as periods of stopped breathing during sleep (obstructive sleep apnea). It is also used to help you stay awake during work hours if you have a work schedule that keeps you from having a normal sleep routine (shift work sleep disorder).
How is it given?
The recommended dose is 200 mg once daily not to exceed 400 mg. It should be administered in the morning for treating narcolepsy or obstructive sleep apnea, and one hour prior to work in those with shift work disorder. It can be taken with or without food. The 400 mg dose may not be more effective than the 200 mg dose.
What are the common side effects?
Headache, nausea, nervousness, dizziness, or difficulty sleeping may occur. If any of these effects persist or worsen, tell your doctor or pharmacist promptly.