Insulin & sleep deprivation

If you stay awake all night you should not take your bedtime insulin. Instead, you inject premeal insulin when you eat every fourth or fifth hour. Adjust the dose according to how much you eat (compare the carbohydrate content of your meal with your usual lunch, tea or evening snack). You should not use the amount of insulin taken at breakfast for comparison because more insulin is commonly needed for breakfast. If you use rapid-acting insulin, and twice-daily intermediate-acting basal insulin, you may need to take half the night time dose to cover your basal need for insulin during a long-distance flight. If you use long-acting insulin, this will probably give sufficient basal effect throughout the flight.