I had to buy sterile vials to take insulin and inject it into one as there were no half units on the pen so I had to use syringes to inject insulin into the syringe inject. That. Two things happened that never happened to my typical pharmacy insulin vials. Firstly there was air in the vial which made it very difficult to put insulin into the syringe and secondly it was also leaking through the top of the vial. I haven't tried the other bottles yet, but I'm throwing them away and will never order again.
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