At least with our son, we’ve found that even when we don’t overtreat an overnight low – if he was falling fast or was below 60 – he gets smacked with that Somogyi effect (when the liver just spits out glycogen following a low).
And as far as that 15/15 rule-- we’ve found that there is no hard and fast number of carbs that works for every situation. We graph Joseph’s sugars and IOB, evaluate the trend (is he falling fast?) and how much insulin he still has in his system from any earlier boluses. Then look at his activity level for that day.
Based on these things, we decide whether to give him, for example, one 4-gram glucose tab, wait ten minutes, then give him maybe 2 cheese crackers (no IOB, not dropping fast, not an active day) vs. 3 or 4 tabs, wait ten minutes, then 4-5 cheese crackers or more…
Now, we also check his blood sugars every 2-3 hours (or less if he had a low) every night.
This is because our son never wakes up when he’s low. We’ll feed him glucose tabs, crackers-- and he’ll munch away without ever even opening his eyes.