Wakefulness

Wakefulness is an increased ability to stay conscious without feeling sleepy combined with a decreased need to sleep.[1] It is contrasted with stimulation in that it does not directly increase one's energy levels above a normal baseline but instead produces feelings of a wakeful, well-rested, and alert state.[2][3] If one is sleepy before using this substance, the impulse to sleep will fade, keeping one’s eyes open will become easier, and the cognitive fog of exhaustion will be reduced.[4] However, sufficiently accumulated sleep deficiency can overpower or negate this effect in extreme cases.[2]

Wakefulness is most commonly induced under the influence of moderate dosages of a wide variety of compounds such as stimulants, nootropics, and psychedelics. However, it is worth noting that the few compounds which selectively induce this effect without a number of other accompanying effects are referred to as eugeroics or wakefulness-promoting agents. These include modafinil[2][3][5][6] and armodafinil[2].