Humulin N was prescribed for my cat at 2.5 units twice a day.
Just checked my NPH. 300ml vial equals 100 units per ml. It is written on the vial.
Remember to always do the 2ml air shot to remove bubbles and place insulin into the needle. Do not skip this step as you could endanger your kitty.
So a vial for your cat will produce: 100 divided by 4.5. = 22 shots per vial.
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