Modvigil 200mg is a well-known generic brand of of modafinil, a substance that helps promote wakefulness. It's often prescribed to assist with conditions leading to severe drowsiness, such as narcolepsy, sleep apnea, and sleep disorders related to working shifts. Important Information About Modvigil 200mg: Main Ingredient: Modafinil Routine Dose: The usual dose is 200mg, typically taken once daily, usually in the morning. Uses: It's used to enhance alertness and wakefulness. It doesn't treat the root causes but aids in controlling the symptoms of extreme daytime sleepiness.