Modafinil is an FDA-approved prescription medication that is categorized as a ‘stimulant’ used to reduce excessive sleepiness caused by narcolepsy. The chemical neurotransmitter known as ‘Dopamine’ which is used by nerves to send signals for communication purposes is actively increased by the use of this drug and helps a person to stay awake and perform normal activities. Modafinil is a great help to make balance in both sleeping/waking routines. I think now you are clear enough about what Modafinil is.