Can someone please tell me what the most current standard of practice is for IM injections? Specifically, I want to know, are we supposed to remove all air from the syringe before injecting the med or do we leave residual air so that the medication does not leak into the subcutaneous space? Also, what about aspirating the syringe back before pushing the med? Lastly, is "Z-Track" the current method? I have learned various ways, and it is interesting to see that every nurse I work with does a little something different.