Dextroamphetamine pharmacokinetics

Co-administration with dextroamphetamine aiso does not significantiy change the pharmacokinetics of eifher modafinii or dextroamphefamine... 

Wong YN, Wang L, Hartman L, Simcoe D, Chen Y, Laughton W, Eldon R, Markland C, Grebow P. Comparison of the single-dose pharmacokinetics and tolerability of modafinil and dextroamphetamine administered alone or in combination in healthy male volunteers. J Clin Pharmacol 1998 38(10) 971-8. 

Hellriegel ET, Arora S, Nelson M, Robertson P Jr. Steady-state pharmacokinetics and tolerability of modafinil administered alone or in combination with dextroamphetamine in healthy volunteers. J Clin Pharmacol 2002 42(4) 450-60. 

---