Anyways, beyond the ridiculousness of an over the counter test non medically trained lay persons are expected to perform on themselves regularly being to invasive for EMTs in many areas....circling back to the OPs question, what I was taught was that if you had a patient who you believed to be hypoglycemic to give sugar (as long as their alert enough to eat a tube of our oral glucose) as its harder to hurt someone with too much sugar, vs someone can rapidly deteriorate and even die with a too low sugar. At least that was what was taught in EMT class (alongside such gems as every ACS or ALOC pt should be placed on high glow O2)