For intravenous use, infusion systems with NovoRapid 100 U/ ml at concentrations from 0.05 U/ ml to 1.0 U/ ml insulin aspart in the infusion fluids 0.9% sodium chloride, 5% dextrose or 10% dextrose inclusive 40 mmol/ l potassium chloride using polypropylene infusion bags are stable at room temperature for 24 hours.