Which guidance is correct for insulin storage and administration in a newly diagnosed diabetes patient?

• A. Unopened vials should be stored at room temperature.
• B. Unopened vials should be stored in the fridge; opened vials at room temperature up to 28–42 days depending on formulation; roll cloudy insulins gently; clean skin and rotate injection sites; count carbohydrates and monitor glucose.
• C. Do not count carbohydrates and rely on urine glucose.
• D. Insulin should be discarded after 24 hours regardless of formulation.

Answer: (B)

Correct insulin storage and administration practices ensure potency and predictable absorption, which supports safe, effective glucose control in a newly diagnosed patient. Unopened vials should be kept in the refrigerator to preserve potency until first use. After opening, many insulins can be kept at room temperature for a limited period—typically about a month, with a range like 28–42 days depending on the specific formulation. When mixing or using cloudy insulins, roll or gently invert them to mix rather than shaking, to avoid bubbles and overly aggressive mixing that can affect absorption. Before injecting, cleanse the skin and rotate injection sites to prevent lipodystrophy and to promote consistent insulin absorption. Carbohydrate counting and daily glucose monitoring are essential for adjusting insulin doses to meals and activity; relying on urine glucose is not reliable for managing dosing. Discarding insulin after 24 hours ignores product-specific shelf life and storage guidelines, since many formulations remain usable well beyond a day.