Answered 6/1/2015 by Samuel Grossman, BS Pharm, Pharm.D, CDE
When you eat a sandwich, for example, blood sugar will rise and fluctuate during the day depending on what you eat and what exercise you do. The dose of insulin is a constant. If you eat more carbohydrates than the dose of insulin can cover, your blood glucose will be higher than anticipated. If you consume less carbohydrates than the dose of insulin can cover, your blood sugar will be lower than anticipated. If the blood glucose is always high regardless of the time of the day, I would recommend to consult with your provider and increase the dose of insulin. Following instructions from your provider, increase the dose of insulin in increments of 2-4 units once a week until your fingersticks are in the range that you and your provider agreed on.