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Modalert 200 mg (Modafinil), the body peaks 2 to 4 hours after ingestion. Its effects on wakefulness and alertness are strongest then. Modalert 200 has a half-life of 12–15 hours, therefore it provides consistent effects throughout the day. Metabolism, age, and health affect peak time. Most users experience peak concentration, alertness, and wakefulness 2–4 hours after consumption. Modalert 200's stimulating effects may last many hours after the peak, but usually fade by day's end. Given its long-lasting effects, Modalert 200 should be taken in the morning or early afternoon to minimize nighttime sleep interruptions.