Modafinil is a prescription drug for patients with narcolepsy, increases concentration of attention and relieves drowsiness, also enhances the perception and memory capacity. Modafinil as a biologically active additive takes a place of honor among nootropic drugs. Modafinil Centurion is a drug that relieves sleepiness in the daytime and for the treatment of narcolepsy. It is possible to improve perception by stimulating neurotransmitters in the brain, used to improve mental abilities.