It seems perfectly reasonable to set up some sort of FDA trade alliance. We decide we trust the European standards bodies for products X,Y,Z, and they trust out

It seems perfectly reasonable to set up some sort of FDA trade alliance. We decide we trust the European standards bodies for products X,Y,Z, and they trust out standards. You don't have to take a driver's test in every state when driving across country. We have a precedent for intra government reciprocal licensing.