I must be an idiot. I didn't put my glasses (reading glasses, I'm 45) on last night to draw my lr3. I drew 30 i.u. of BW, then thought I drew 40mcg of lr3. I was paying so much attention to the tick marks I didn't look at the liquid. I had actually pushed the slin needle through the lr3 and drew air. I then stuck my bicep and as I was pushing realized it was 40mcg of air. Thank god I'm not an I.V. drug user (lol). Probably not enough to do anything even if I was. This is a good lesson men....check for bubbles and aspirate, aspirate, aspirate.