Artvigil often begins to work 30 to 60 minutes after being taken without food. It can take up to two hours for some people, especially if taken with meals, but modest alertness may be felt as early as twenty minutes for others. Increased alertness, concentration, and mental clarity are among the most notable effects, which usually appear two to four hours after use. The duration of its effects varies from 10 to 14 hours, contingent on individual sensitivity, metabolism, dose, and sleep quality.
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