Short acting (regular) insulin peak is typically:

Short acting (regular) insulin peak is typically:

• A. 1-2 hrs
• B. 2-5 hrs
• C. 4-6 hrs
• D. 6-8 hrs

Answer: (B)

Short-acting (regular) insulin is slower to act than rapid-acting insulins but faster than long-acting ones. After injection, it starts working in about 30 to 60 minutes, reaches its highest effect in roughly 2 to 4 hours, and lasts about 5 to 7 hours. So, among the given options, the window that best matches the peak is around 2 to 5 hours. Clinically, this peak means hypoglycemia risk is greatest during that period, so timing meals and monitoring should be planned to coincide with it. The other ranges are outside the typical peak window for regular insulin.

Short-acting (regular) insulin is slower to act than rapid-acting insulins but faster than long-acting ones. After injection, it starts working in about 30 to 60 minutes, reaches its highest effect in roughly 2 to 4 hours, and lasts about 5 to 7 hours. So, among the given options, the window that best matches the peak is around 2 to 5 hours. Clinically, this peak means hypoglycemia risk is greatest during that period, so timing meals and monitoring should be planned to coincide with it. The other ranges are outside the typical peak window for regular insulin.