Just simply remove the saline from your hands while in the middle of healing a friend and it will not be consumed.
I can confirm it works with other medical supplies like morphine and epi-pens. I haven't tried others though. Simply just press 'H' to put away whatever is in your hands when during this glitch if you have space in your inventory.
Great find cant believe something this simple works
Works like a charm.
Last edited by F L U X; 09-01-2016 at 11:16 AM.