The U.S. FDA has recently notified at least one pharmacy that they will no longer be allowed to manufacture or distribute injectable vitamin C.
With at least one pharmacy, the FDA may also be banning injectable magnesium chloride and injectable vitamin B-complex 100.
These two substances are often added to intravenous C to make the "Myers Cocktail," which many people use for a variety of chronic conditions -- usually under the care of a qualified physician.
The Alliance for Natural Health has this to say on the subject:
"... [W]hy is this being done? What possible rationale is offered? Because it's dangerous? No. Because it can't be patented and therefore won't be taken through the standard FDA approval process. No matter that vitamin C is one of the least toxic components of our food supply and liquid forms of it have been used safely for decades."