Which insulin type remains effective at room temperature for 28 days?

The insulin type that remains effective at room temperature for 28 days is Lispro, commonly known as Humalog. This rapid-acting insulin is designed for more flexible administration, allowing patients to manage their blood sugar levels effectively around mealtime.

Lispro can be stored at room temperature for up to 28 days once it has been opened, making it convenient for those who may not have refrigeration available or who prefer to carry their insulin without worrying about temperature control during that time. This attribute can enhance adherence to insulin regimens as it simplifies storage and accessibility.

In contrast, other types of insulins may require refrigeration beyond a certain period after opening. For instance, Humulin N, a cloudy intermediate-acting insulin, and Humulin R U-500, a concentrated form of regular insulin, typically maintain stability at room temperature for a shorter duration. Afrezza, on the other hand, is an inhaled insulin formulation that has different storage requirements. Understanding these characteristics is essential for effective diabetes management.