Modalert 200 australia keeps consumers awake for 12–15 hours. It starts working 30–60 minutes after consumption and peaks 2–4 hours later. Metabolism, dose, and tolerance affect duration. Many individuals enjoy continuous wakefulness, although others may see its effects fade. Use modafinil as advised and visit a doctor if you have questions regarding its duration or adverse effects. Use it for wakefulness in conjunction with appropriate sleep hygiene and healthy living habits.