Modvigil is a prescription medication for the treatment of excessive sleepiness caused by narcolepsy, obstructive sleep apnea, shift-work sleep disorder. Its medical use was approved by the FDA in 1998. This medication is containing the active ingredient of Modafinil, a central nervous system stimulant used to improve wakefulness in adults. It is typically taken orally once a day in the morning. Common side effects may include headache, nausea, nervousness, and insomnia. It is important to follow the prescribed dosage and consult a healthcare professional before use. For more information on Modvigil, visit the website Online Pills Store.