Checking your blood glucose and recording the results can help tell you how well your insulin is working.
Your doctor needs to look at your blood glucose results and your record of insulin doses. Ask about when your insulin starts to work, when it works hardest and how long it lasts.
Look for patterns of high and low blood glucose then make adjustments so that you are within the target range most of the time.
Keeping a record of your insulin use and blood glucose results can help you and your doctor understand how to better adjust your insulin.