However, research yet does not know the entire working of the Modafinil smart drug. However, researchers are aware that it works. Therefore, it mainly acts on the central nervous system. In our CNS some brain chemicals rest the wake-up/sleep cycle. Modafinil Nootropic works to inhibit the reuptake of dopamine chemicals that helps to enhance cognitive abilities, including aim, alertness, memory, and so on. This drug helps to keep you focused and helps in decision-making. It is real mood-altering medicine.