Question: what is the difference between using sterile saline for injection and sterile water for injection?
Answer: Sterile Water for Injection is packaged in single-dose containers not larger than 1 L.” So the way I see it, the difference between those two is that: 1/ Sterile WFI (or Distilled water) is packed in containers and used for dissolving or diluting substances or preparations for parenteral administration before use.