Kava doesn't usually mesh well with benzos. I read it in this anxiety workbook I have. If the tea you have is Yogi Stress Relief (I can't remember exactly what it's called), it has Kava in it. I also remember reading that Kava used on its own is not a good treatment for anxiety, although it can provide some relief in the short-term. There's also l-theanine. That's like a supplement though so check with your doctor first before taking it.