Modafinil is a wake-promoting agent that works as a wakefulness promoting agent in people who suffers from excessive daytime sleepiness. Daytime sleepiness can be caused by various sleep disorders such as insomnia, shift-work sleep disorder and obstructive sleep apnea. Modafinil affect sleep promoting neurons in the brain and helps users to stay active. It works by boosting dopamine, and serotonin level in the brain that control sleep and wakefulness. For more detailed information about Modafinil, visit the website Health Matter.