How long can you go without sleep on modafinil?

Modalert 200 mg tablets is intended to encourage wakefulness and may assist people in remaining alert for prolonged periods of time, it does not completely replace the need for sleep. Although modafinil may lessen feelings of fatigue and increase alertness, it cannot replace sleep and cannot continue to support regular bodily and mental processes permanently. While using modafinil, users may remain up later than normal, but sleep deprivation still has negative effects on performance and health. Maintaining general wellbeing requires taking modafinil as directed by a doctor and making sure you get regular, restful sleep. For individualised advice, always speak with a healthcare professional.