If you use the needle youve pinned with to draw from your 10ml vial, some of the material (blood products bacteria, dermis etc) on and in the needle will be injected into your new vial CONAMINATING THE WHOLE LOT and how long is that vial going to sit around allowing bacteria to multiply. I suggest using STERILE single use needles for drawing from a multidose vial.
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No no, to clarify: I reuse the same pin for drawing when I'm running low
I switch it out with a fresh pin for injecting. The drawing pin never goes anywhere but inside the vial and back in it's casing.
