Vilafinil vs. Provigil: Which Medication is a better cognitive Enhancer Medicine? Vilafinil and Provigil are cognitive enhancer meds that are used to help you stay awake and alert. These meds are usually prescribed to patients with certain sleep disorders, but some people take it to boost brain function as well. In this article, we'll discuss Vilafinil vs. Provigil, along with some of their side effects and possible interactions. (Buy Modafinil Online)