Under every house is a foundation, and under most foundations are footings. Most of the time we take footings for granted, and usually we can: For typical soils, a common 16- or 20-inch-wide footing can more than handle the relatively light weight of an ordinary house.
According to HomeDrugTestingKit, amphetamines are detectable in urine for up to 4 days. This is an average as everyone metabolizes medication at different rates. According to the prescribing packet insert for Adderall, it has a half-life of 12 hours for staying in your system. For more information about how it affects your bloodstream I suggest you refer to the packet insert with the medication, or ask your doctor.
Starting with urine tests, Adderall can usually be detected in urine tests for 1-3 days after last use. This is much less than street drugs like weed, but it might still be inconvenient to go without medication for three days.