Which insulin can be used intravenously to lower potassium levels?

Which insulin can be used intravenously to lower potassium levels?

• A. Glargine
• B. NPH
• C. Regular
• D. Lispro

Answer: (C)

Regular insulin is used intravenously to lower potassium levels because it quickly shifts potassium from the blood into cells by stimulating the Na+/K+ ATPase pump, which reduces serum potassium. When given IV, regular insulin acts rapidly and is paired with glucose to prevent hypoglycemia, making it an effective emergency therapy for hyperkalemia. Other insulin types, like lispro, glargine, or NPH, are designed for subcutaneous use and do not have appropriate IV pharmacokinetics, so they aren’t suitable for rapid potassium lowering. The key idea is that only regular insulin is administered IV to rapidly drive potassium into cells and lower the blood potassium level.

Regular insulin is used intravenously to lower potassium levels because it quickly shifts potassium from the blood into cells by stimulating the Na+/K+ ATPase pump, which reduces serum potassium. When given IV, regular insulin acts rapidly and is paired with glucose to prevent hypoglycemia, making it an effective emergency therapy for hyperkalemia. Other insulin types, like lispro, glargine, or NPH, are designed for subcutaneous use and do not have appropriate IV pharmacokinetics, so they aren’t suitable for rapid potassium lowering. The key idea is that only regular insulin is administered IV to rapidly drive potassium into cells and lower the blood potassium level.