Xanax is important to follow the instructions on the label for safely taking the medication. If you want to purchase Xanax (Alprazolam) online, it is important to take it as directed. There may be side effects associated when we take Xanax, so it is important to be aware of these. You should also discuss with your doctor about any other medications or supplements if you are taking, as these could interact negatively with Xanax (Alprazolam).