A pharmaceutically acceptable insulin premix formulation contains about 0.1-10.0 Unit/mL of insulin for intravenous administration and preferably further contains a tonicity adjuster. The methods for making and using such formulation are also provided. The pharmaceutically acceptable insulin premix formulation may be aseptically filled into a flexible container assembly to form a pharmaceutical insulin premix product. The insulin premix product can be a sterile and ready-to-use aqueous solution for glycemic control in an individual with metabolic disorders through intravenous infusion. The insulin premix product is unexpectedly stable when freshly prepared and also during its shelf-life of storage at refrigeration temperatures of 2° C. to 5° C. for 24 months followed by additional 30 days at room temperatures of 23° C. to 27° C., even without any added preservative, any added zinc, any added surfactant or any other added stabilizing excipient.
