Modawake 200 mg is a prescription medication used to promote wakefulness in people with excessive sleepiness caused by conditions like narcolepsy, obstructive sleep apnea, or shift work sleep disorder. It contains modafinil, a wakefulness-promoting agent that works by affecting certain chemicals in the brain. Modawake helps improve alertness and reduces the tendency to fall asleep during the day. It is not a cure but helps manage symptoms effectively.