Modalert 200 is a prescription medication that contains the active ingredient modafinil. Modalert 200 is primarily used to treat sleep disorders such as narcolepsy, sleep apnea, and shift work sleep disorder.

Modafinil is believed to work by increasing the activity of certain neurotransmitters in the brain that promote wakefulness and alertness, such as dopamine, norepinephrine, and histamine. This makes it an effective medication for people who have trouble staying awake during the day due to a sleep disorder.