For those of you in medicine, you surely know that verbal orders can be a lifesaver. If I had to go to a unit every time I wanted a patient to get Tylenol, that would be a massive waste of my time. Instead you can just tell the nurse over the phone to give the Tylenol, then sign the order when you're on that unit.
An attending I talked to recently told me that when he was a resident, the hospital where he trained didn't allow verbal orders. But at the same time, the residents took call from home.
So say a patient had a mild headache and wanted Tylenol. Instead of telling the nurse to give it, you had to drive all the way to the hospital (he lived thirty minutes away) and write the order, then drive home.
He said that it resulted in crazy amounts of PRN orders. He said that the residents would sit there, brainstorming every medication a patient might possibly need during the night, and writing a PRN order for it.