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A member asked:
How long will amphetamine salts 20 mg last?
A doctor has provided 1 answer
Depends: If the formulation is adderall, (dextroamphetamine and racemic amphetamine) the immediate release usually lasts approximately four hours. The extended released usually lasts eight hours. However, this assumes that one metabolizes the medication at an average rate.
Answered 11/7/2018
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