Well, I just did my mixing & first injection. Whew! It was a little nerve wracking... but I'm pretty certain I did it right. 3ml bac water into mixing vial, 1ml bac water into my 2000IU (Hucog) vial, roll gently, then draw up & inject into my mixing vial. I then drew up to the 30 (150iu?) on my injection needle.