 Apparent steady state for armodafinil was reached within 7 days of dosing.At steady state, the systemic exposure for armodafinil is 1.8 times the exposure observed after a single dose.The concentration-time profiles of the ("R")-(−)-enantiomer following a single dose of 50 mg Nuvigil or 100 mg Provigil (modafinil being a 1