Provigil is a well-known prescription medication offered in 100 mg and 200 mg dosages, with the active ingredient Modafinil. It is widely used to alleviate excessive daytime sleepiness associated with several sleep disorders, including narcolepsy, obstructive sleep apnea, and shift work sleep disorder. Manufactured by leading pharmaceutical companies, Provigil effectively enhances wakefulness and alertness in affected individuals. It is available under various brand names around the world.