I am 6ft 3 in and weigh 235. i took a 20 mg instant release adderall (dextroamphetamine and racemic amphetamine) and got a pop test approx 103 hours later. did i fail the test??

Half-life: It takes between 10 thru 12 half-life periods for the drug to be eliminated entirely from your system. Adderall (dextroamphetamine and racemic amphetamine) has a half-life of 9 - 11 hrs. Do the math. The ranges are because people metabolize differently and other intakes and activity levels or illness can matter a bit. If you have a valid Rx - you can present it as justification. Best!