People who have difficulty staying awake during scheduled working hours and falling asleep during scheduled sleeping hours use cognitive enhancers such as Modafinil. Modafinil is a CNS stimulant used to treat excessive drowsiness caused by obstructive sleep apnea (OSA), narcolepsy, or shift work sleep disorder. It boosts dopamine and orexin levels in the brain and modifies the activity of a specific molecule in the brain to improve wakefulness. It also increases serotonin synthesis in many brain areas. Modafinil boosts productivity by boosting attention, concentration, and motivation. Modafinil use can help you resume a regular sleeping pattern to some extent. Modafinil is classified as a Schedule IV prohibited substance by the FDA, making it illegal to purchase modafinil without a prescription. Modafinil comes in 100 mg and 200 mg levels and may be acquired online by just submitting a copy of a prescription from any trustworthy pharmaceutical website.