Antibiotic Duration Decisions

An antibiotic order is incomplete if it names an indication but has no reassessment point or stopping plan. The NP chooses duration by linking four questions: What syndrome is being treated? Is the drug active at the infection site? Is the patient improving with adequate source control? Does the host, anatomy, organism, or device require a longer course? A patient who is stable and improving should not receive extra days simply because a traditional 10- or 14-day habit persists. Conversely, persistent instability, poor absorption, an undrained focus, resistant infection, or a condition requiring prolonged therapy makes shortening unsafe. In Canada, apply evidence-based duration guidance alongside provincial or territorial prescribing authority, local stewardship pathways and antibiograms, and the applicable Health Canada product monograph.