Can a blood drug test determine how much of my. Kolonopin and Vyvanse (lisdexamfetamine) I've taken all month long or is there a.detection period? Why not do a urine test

Yes. If you are taking your medicine on a consistent basis, a Steady State Serum or Blood test should provide a pretty good indication of your adherence to directions. Urine Drug testing only gives a qualitative indication of your medication taking history-in other words-yes you are taking or no you're not taking it. The blood level is an instant snapshot of your blood level so it is difficult to fool.