Modafinil is a new generation smart drug that enhances the function of your brain. It is a prescription medicine that belongs to a class of medicines which are referred to as the “waking drugs”. It is an oral drug which is used to treat narcolepsy. Narcolepsy is a condition that makes a person excessively sleepy during day time. Modafinil chemically contains Diphenylmethylsulfinylacetamide 100 mg or 200 mg. Modafinil is the generic term for medicines sold under the brand names Provigil or Modalert (manufactured by Sun Pharmaceuticals). Modafinil is also used in patients who uses breathing devices for Obstructive Sleep Apnea (OSA) or other therapies to prevent excessive daytime sleepiness. Modafinil is a distinctive medicine which improves your neurological function.  It is unique in its properties which selectively targets the sleep centre in the brain unlike other medicines which acts on our central nervous system.