The blood content of armodafinil, which is an ingredient in Modalert 200mg australia, usually peaks two hours after consumption.  The drug's peak effects, such heightened wakefulness and alertness, might last for a few hours, usually four to six.  However, the length of time may differ based on individual reaction, dose, and metabolism.  Although the main impact of Modalert is in the first few hours after taking the medication, overall effects may last for 12 to 15 hours.  It is crucial to remember that everyone reacts to the medicine differently, and some people may experience its stimulating effects for a longer period of time.  To prevent adverse effects, always take the medication as directed.