All IV/C is sodium ascorbate (or should be!). Buffered ascorbic acid at least, and some people have 100 to 200 g infusions. To my knowledge, these infusions have no/little effect on blood pressure.
As we have mentioned previously, it is not sodium per se, but highly refined sodium chloride (table salt) that seems to cause problems.
Owen R. Fonorow, Orthomolecular Naturopath