When you have a pre-shot that is too low to shoot, stall 30 minutes without feeding and re-test.
- If above your no-shot limit, the glucose is both rising and safe to shoot.
- If dropping, definitely don't shoot
- If level, you might consider a reduced dose, based on what you know about how much a given dose drops the glucose.
Have you got the U-100 syringes with half unit marks? We frequently estimate 0.25 and 0.75 unit increments on syringes. If he rises later in the evening and you want to shoot, you might give 0.25 or 0.5 units, so that you can shoot in the morning.