I've been using the pre-filled insulin pens for about 3 years now and this is the first time this has ever happened. I gave myself a normal Lantus dose and noticed that when I was removing the used needle there was a cloud of red blood floating inside the pen.
I have another week's worth of insulin left in this pen and I really don't want to have to toss it out, but I honestly have no idea if a small amount of my own blood in there is harmful or not. Anyone have any idea?
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