Modafinil, sold under the trade name Modvigil 200mg among others, is a wakefulness-promoting medication used to treat conditions including narcolepsy, OSA, and SWSD. It stimulates mental alertness and wakefulness by elevating dopamine and norepinephrine levels in the brain.

Take 200 milligrams (mg) of Modvigil once daily, ideally in the morning, with or without meal. Adults should take 200mg daily, however this may be adjusted up or down based on symptoms and how well the drug is working for each person. Modvigil 200 mg may cause adverse effects including headache, nausea, anxiety, and sleeplessness, thus it's vital to take it exactly as prescribed by a doctor.

People with sleep difficulties might benefit from taking 200 milligrams of Modvigil to stay awake and sharp during the day. Use only as directed by your doctor, and keep in mind that this medicine may interfere with others you may be taking.