I'm definitely considering it because I finished my last cycle before I got half way through that vial, which is now a good 5 months old and I won't be starting my next cycle until mid January. I've always swabbed the seal before each use and always use fresh needles and keep the vial in the medicine container, but especially since I use 18 g needles to draw, I'm concerned the vial could have still become contaminated over time. Am I just being paranoid? Looking at the other posts, I'm thinking I should switch to a 23 g needle to draw..