I am on my second 2.5mg pen and have taken 2 normal doses of 2.5mg but have taken 3.75mg from the next dose. I injected the regular 2.5mg dose then twisted the pen another 30 clicks to get half a dose of 1.25mg using the same needle. is this a problem? I have seen other posters mentioning using a new needle for this. Is that for hygiene purposes, is it dangerous and could snap off, or for effectiveness of the dose reasons? I am curious as it didn't cross my mind to use a new needle and now I feel slightly silly for not considering this. I was very careful and they were both injected about 10 seconds apart into the same area. I plan to do the same next week with the remaining half dose and use an insulin syringe for the golden dose ( 0.6ml)