@mimbek maybe someone else knows safe, but I think that if there is average bolis for novorapid !!:-? Likewise and what you say apart between them, it is small, at least for what they told me when they changed me, now I use a bomb. The Apidra begins to take effect at the 20th minute and novorapid at 15 min, and the effectiveness for Apidra lasts 4h, while Novorapid lasts 3h, if I remember correctly. For our own experience, do not notice change, but as we all know, every body is a world.You will tell us how the change was.