How long before surgery should I stop taking adapex. Phedrmine diet pills?

Depends on the diet pill however I don't recommend any diet pills for 1 month prior to surgery.  For Adapex I am not familiar with this medication however you need to check in with your pharmacist and physician to be certain.  For a BBL I'd recommend not actively trying to change your weight before surgery.  

Thank you for your question . You should not take these medications at all specially if you are looking to have a Brazilian Butt Lift as you will need as much fat as possible for your great results in your desired procedure .Please visit with a board certified plastic surgeon with years of experience and great reviews in your procedure.