Ativan and Xanax do NOT have equivalent dosing.
So no, .5 ativan does not equal .5 xanax.
Also, Xanax tends to be more sedating and faster acting than ativan; it also (for most people) gets out of your system faster.
She smokes a little weed and had probably popped a xnax or two to relax,but " It's Hollywood babe" - Kat, von, D says:). Who knows what she does,but the weed I am positive. Check out the pics of her hitting a huge pipe! Type in ' Kristen Stewart smoking weed'
You really shouldn't be on a prescription for Adderall and Xanax at the same time. It's possible that Adderall could potentiate the effects of the xanax. That means that if you mix them, you normal dose of Xanax could knock you out. It also depends on if you are taking Adderall because you have been diagnosed with ADD. The effects of Adderall are different for people who do not have ADD.