Many users experience more wakefulness, enhanced alertness, and improved sustained concentration without the jitteriness of conventional stimulants, modafinil modvigil is frequently referred to as a "miracle drug." Its authorized applications are for sleep-wake disorders including narcolepsy, shift work disorder, and exhaustion associated with sleep apnea, thus it is not a miracle medication. There are conflicting off-label claims regarding cognitive improvement, and the advantages differ greatly.