That's a great question. Different chemicals are handled differently by the body, but right now there is no science that says DEHP or another phthalate from some medical therapy are interacting together and producing a synergistic effect. I think that's what you're asking. There is no data that says that.
There's no data that says any chemical coming from any material in a medical therapy is interacting with other chemicals and producing more pronounced effects than you would get with the individual chemical. Again, that isn't a unique feature of PVC and DEHP. That's how all medical products act when they're in contact with the body.