Adderall, a stimulant medication for ADHD, can remain in the body for different lengths of time depending on dose, metabolism, and overall health. On average, Adderall has a half-life of about 10 hours, meaning traces may last 2–4 days. Extended-release versions can linger slightly longer. Drug tests may detect it in urine, blood, or hair. Always use Adderall only as prescribed by a medical professional.