What is the safest way to switch from concerta to adderall (dextroamphetamine and racemic amphetamine)?

Just switch: A nice aspect of stimulants is that they are out of your body by the beginning of the next day. We know roughly the dose equivalents among stimulants (25-30 mg of Adderall (dextroamphetamine and racemic amphetamine) is about equal to 54 mg of concerta); but, individual reactions vary. In switching, i usually start at a slightly lower dose that the conversion would suggest, then raise it if needed.

Concerta: As instructed by your doctor, stop one & start the other.