Im not sure why your concerned. As long as you know what the drugs are for, how to safely administer them and what the side effects are, it shouldnt be a problem. The problem might be that if you are not allowed to give IV push meds on your floor, and they ordered an IV push med, then the doc needs to give it. I work in ICU, so I dont know if its different, but I have pushed bicarb many many times. I have added it to the maintenance IV (usually D5W) many times and ran it that way too. As far as magnesium, its no different that say giving a potassium bolus. You dilute the magnesim in a mini bag or buretrol and run it over an hour or more. Why are you concerned that you giving any of these meds would harm your patient? As long as you follow the correct procedure, it shouldnt be a problem.