Modvigil works for ten to twelve hours after consumption. Peak performance usually occurs two to four hours after taking the dosage, and most people start to feel its benefits within thirty to sixty minutes. Modvigil is widely used to treat sleep problems and for off-label productivity usage since it improves alertness, focus, and cognitive performance. Depending on tolerance, dose, and individual metabolism, its duration may change. Modvigil may cause sleep disturbances if taken too late in the day. To guarantee consistent and safe results, take Modvigil exactly as directed.