No that shouldn't be a concern, Kambo raises blood pressure for sure; Gets heart pumping hard and fast, raises blood pressure in the head, causes skin to get hot and flushed.
Some people have been known to pass out, which I guess could be due to a sudden drop in blood pressure depending on how the kambo is working on the body? but no one has been hurt from it, and a sitter could put some tincture of cayenne in the mouth to keep you conscious, though it won't be too enjoyable lol.