Salvaging Test Out of Needle

So I pinned today, 0.2 ml. After injection I pulled back on what was left in needle and to my surprise there was 0.1ml Can I just leave that in the syringe and use it again in 3 days?
I have to be careful with wastage, as I’m prescribed 1 shot 250mg a fortnight and I am currently doing 0.2 every 3.5 days. I’m just worried of falling short on my last shot before next prescription comes.

No. That’s not sterile. There’s always a little left after you’ve depressed the plunger to the very end. That’s compensated for in the barrel’s measurement, by the way.


I had no idea this was the case! Very interesting!