I took 160mg of generic adderall (dextroamphetamine and racemic amphetamine) in two days how long will it take to be out of my system? i have a urine test in two weeks will it still show up ?

The half-life of: Adderall (dextroamphetamine and racemic amphetamine) is between 9 and 13 hours, depending upon the type and your metabolism. Take the average of 10 hours as an example. Take 10 MG and ten hours later only 5 MG is left, and ten hours after than 2.5 MG, etc. At this rate, only one dose would be out of your system in a few days. Better to tell the testers of your use, just in case, especially if legit.

The maximum adult : daily dose of MAS is 40 mg. for ADHD & 60 mg. for narcolepsy. You're risking HBP, heart attack &/or stroke. A drug's "half-life" is the time it takes takes for its blood level to decrease by half. It takes about 5 ½ half-lives for a dose to be completely "gone". Other factors are duration of use, body size, metabolism, GI & urine pH. It would show up in hair, but probably not urine, in 2 weeks.