Vilifinilis the generic form of modafinil, a medicine licenced by the FDA for the treatment of sleepiness during the day. Vilafinil is made by Centurion Laboratories in India and is widely distributed online.
There is no difference between generic and brand-name pharmaceuticals, as stated by the Food and Drug Administration (FDA), and studies have shown that generic drugs provide "similar clinical outcomes" to brand-name drugs. Vilafinil 200mg provides the same advantages as popular modafinil brands like Provigil, but at a far more affordable price.
Since Centurion Labs didn't have to pay for any of the research and development expenditures associated with modafinil, manufacturing Vilafinil at their own expense makes it far more affordable than Provigil. This allows them to make the drug at a lower cost, which they can then pass on to their customers.