I was wondering if it is normal for a nurse to run a primary of NS at 10ml/hr when you are hanging a small bag of antibiotics (50ml), when there is no order for the NS to begin with. My pt had no fluids running or any order for fluids but my instructor said to hang the NS and back prime to avoid wasting a significant amount of the atb priming and then just set the rate for the NS at 10ml/hr. She said some nurses don't feel comfortable doing this...is it because it's illegal?