On Web MD, they say not to take them together because St. John's Wort causes the Xanax to not work due to how it is processed in the liver. (You may look it up for a more accurate description.) I had just been taking Xanax as needed, trying not to take it unless necessary. A doctor gave me SJW from her line of supplements. It really helped. Because of it, I rarely need the Xanax. However, I have taken it on occasion. It's true, it didn't seem to work as well, but it worked some. So, my understanding is that it just causes the Xanax to not work as good as usual.
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