Modalert 200is to increase wakefulness for ten to fifteen hours at a time. Most folks don't have the typical need to sleep at that time and are able to remain up and aware. It does not, however, remove the body's requirement for sleep. Pushing past a typical waking cycle (18–24 hours or longer) will still result in exhaustion, impaired judgment, and other adverse consequences. It is not safe to extend this window with higher dosages. Sleep is still crucial for both physical and mental healing.