Sugar 15.4 How Do I Get It Down
If that is a one time thing, ride it out (but drinking water will at least knock it down a bit)
If that is somewhat "common" then you need a new class of meds so see your doctor "soon" - sustained levels above 7.8 do all kinds of vascular damage that is cumulative so don't ignore it
For me, bicycling, walking, stair climbing, all bring down my numbers.
Drinking extra water can help a bit if you are dehydrated.
Insulin can help.
Is My Sugar To Low
Gabapentin
What's Your A1C Right Now?