Thanks for the prompt response!
As a follow up, you mentioned that if a tolerance were to develop (everything else I've read seems to indicate that a tolerance to amphetamine usually does develop quickly), a dosage adjustment would be made by my doctor. I guess I'm wondering if there is some way to avoid the need for the dosage adjustment all together. Would taking time off from the Adderall (say, 2 weeks, for example) and using ephedrine during those two weeks be one way to do that? My thinking is that if they are different compounds, alternating their use would prevent such a tolerance from developing.