Yes I'm an RN. I just used a 1L NS bag because that is the most common IV infusion we give. We don't carry NS 50ml or 100ml bags. So if a patient had a L of NS infusing or something, would injecting phenergan 12.5-25mg into the bag still have the desired effect? I just want some opinions on if it is acceptable to do it this way. That even though it will take longer to get the full dose that the effect will be the same.