What is the difference between Adderall and phentermine?

Tricia; my good friend Stephen has answered you perfectly, And I just want to add in no way can you interchange this medication they would totally defeat your purpose. Don't waste your time and never take the 2 at the same time. Good luck Chuck1957 friend of Stephen.

Hi Tricia, the main difference is their chemical structure, both have a similar structure to human adrenaline but adderall (d/l amphetamine; d & l are mirror images of each other) has uses in human behaviour modification whereas phentermine seems to be almost exclusively an appetite suppressant and designed for short term use only.