What is the storage duration for Humulin R U-500 in a vial?

Humulin R U-500, a concentrated insulin formulation, has a specified storage duration of up to 40 days after being opened and in use. This extended timeframe allows individuals receiving this particular insulin type to effectively manage their diabetes without needing to frequently replace their vials, which helps to ensure treatment continuity and better adherence to their diabetes management plan.

When not in use, Humulin R U-500 should be stored in the refrigerator to maintain its efficacy, but once it is opened, the 40-day guideline comes into play, allowing for convenient access to the insulin without compromising safety or effectiveness. This contrasts with the storage durations of other forms of insulin, which may have shorter timelines, emphasizing the unique stability of U-500 in an opened vial.