At what threshold do you recommend intravenous potassium, magnesium, and phosphorus replacement in a stable postoperative patient who can take medications by mouth?

I would not give intravenous potassium unless there is an active arrhythmia. Oral potassium is much preferred. Magnesium in inpatients should usually be given intravenously. Oral magnesium is a major cause of diarrhea and is hard to tolerate. It also takes a long time to work. I would give intraveno...