Nope, haven't heard of that concerning birth control but there are so many medications in the world, it is bound to happen. For me, Kava is good medicine that induces calmness and sleep. It sho' is relaxin! However some of the guys here can talk about beta blockers and other pharmaceutical terms and perhaps that will help you calculate the interactions. I think Kava would be bad for birth control because it would relax the male species and perhaps be conducive to making babies ... in a relaxing way. Whenever you are having problem conceiving, the Docs always tells the couple to "relax" and not fret about it. My misguided 2 cents.
