I once had a doctor give me an antibiotic prescription, but a conditional one. I'm very prone to sinus infections after viral nasal infections, and went in after being sick with a doozy of one for a week. "It's probably still just viral and will go away quickly if it is. If you don't get better in four more days, fill the prescription and start taking it". Seems like a sane course of action that prevents more doctor visits, but potentially not scaleable.