Mealtime Insulin Initiation and Management

Initial Dosing and Titration

The American Diabetes Association recommends starting with 4 units per meal, 0.1 units/kg per meal, or 10% of the basal insulin dose per meal if the HbA1c is less than 8% 1
An alternative calculation is 0.1 units/kg body weight per meal, as suggested by the American College of Physicians 2
Consider decreasing the basal insulin dose by the same amount as the starting mealtime dose to prevent hypoglycemia, according to the American College of Physicians 2

The American College of Physicians recommends adding prandial insulin when basal insulin has been titrated to acceptable fasting blood glucose levels but HbA1c remains above target 3, 4
Initiation is also recommended when basal insulin dose exceeds 0.5 units/kg per day and glycemic goals are not met, as per the American College of Physicians 3, 4

Begin with a single injection before the largest meal or the meal with the greatest postprandial glucose excursion, as recommended by the American Diabetes Association 1
This approach reduces injection burden initially and allows assessment of patient tolerance and response, according to the American College of Physicians 3

The American College of Physicians recommends continuing metformin in most cases when initiating mealtime insulin 3, 4
Discontinue sulfonylureas to reduce hypoglycemia risk, as suggested by the American College of Physicians 3, 4
Discontinue DPP-4 inhibitors as they become redundant with prandial insulin, according to the American College of Physicians 3, 4

Rapid-acting insulin analogues should be injected 0-5 minutes before meals, as recommended by the American College of Physicians 7, 8

Do not delay insulin intensification when basal insulin alone is insufficient, as this leads to prolonged hyperglycemia and increased complication risk, according to the American College of Physicians 7, 8
Ensure patient education on carbohydrate counting and dose adjustment before initiating mealtime insulin to optimize safety and efficacy, as recommended by the American College of Physicians 2