Posted 12/25/2008 7:28 AM (GMT -6)
I think there is a specific chemical impurity in cat's claw that interacts, if you get high quality supplement you can read the label, it will say something like "less than 1% [insert chemical name which I don't recall]". My first doctors said as long as the cat's claw label says that really low number of that particular chemical it is ok to take. My second doctor said not to take it due to the interaction. I only take it very rarely now.