Modalert 200mg is designed to promote wakefulness and sustained alertness for an extended period. In most individuals, the effects begin within 30 to 60 minutes after ingestion. The peak benefits are typically felt around 2 to 4 hours and can last for approximately 10 to 12 hours. This long duration makes Modalert 200 mg suitable for managing excessive daytime sleepiness, long working hours, or night shifts. However, the exact duration may vary depending on factors such as metabolism, age, body weight, dosage, and overall health. Taking Modalert 200 mg later in the day may interfere with normal sleep patterns, so it is usually recommended in the morning. Always follow medical advice for safe and effective use.