After first use, insulin should be stored at room temperature for how many days?

• A. 60 days
• B. 28 days
• C. 14 days
• D. 7 days

Answer: (B)

Insulin should be stored at room temperature for 28 days after first use. This window balances maintaining potency and minimizing injection discomfort, since exposure to heat and light can degrade insulin over time. Keep the product away from direct sunlight and heat, and don’t let it freeze. If temperatures are unusually high, always check the label for any product-specific guidance. Unopened insulin kept in the fridge remains valid until its expiry, but once opened or used, it should be kept at room temperature for up to 28 days.