The normal blood sugar range is anywhere between 80 to 120mg/dl. However, a person generally isn't considered hypoglycemic until the reading measures below 70mg/dl and is accompanied by symptoms including dizzyness, sweating, confusion, irritability, etc.
All these things could appear like a panic attack so its an important distinction to be made. If lots of sugar helps alleviate your symptoms of panic, I would get your blood sugar tested regularly to see what is happening. A TRUE case of hypoglycemia is indeed rare and usually only occurs in diabetics taking to much insulin or medication, but it can and does happen to others.
some countries have a different scale, normal being between about 4 to 9
a further complication is that until recently, and perhaps still now, naturapaths didnt know about panic attacks and often put panic attack sufferers on a special hypoclycemia diet, having wrongly diagnosed them
until fairly recently, ambulance workers didnt know about panic attacks either