Blood glucose applies to every person (CAH or not, and to non-salt-wasting CAH).  Supposedly, all children 8 and under are most susceptible to low blood glucose problems.  Blood glucose tablets are used by diabetics to raise their glucose at times they feel low blood glucose systems (light-headedness, dizziness, great hunger) to raise blood glucose quickly (if they can't get to a glass of orange juice or so right away).  They are not a prescription item, and can be found at probably all drug stores and some grocery stores.  Cheap - about $1.40 for 10-12 tablets and they taste like candy.   Have you ever felt light-headed or dizzy, hungry, and you haven't eaten for a while?  That is probably low blood glucose symptoms.  Supposedly after a good meal, the glucose level measures around 140-150.  Supposedly around a level of 70-80, the low blood glucose symptoms kick in.  However, certain people have been known to go into dangerously low blood glucose levels without having any symptoms at all.  Have you ever heard the terms "diabetic coma" or "diabetic seizure"?  These are the terms given to a diabetic person who went into very severe low blood glucose.  A glucose level of 30 or below can cause brain damage, seizures, coma .... get a little bit lower, and "death."  A lot of diabetics die from low blood glucose matters, so do a lot of CAH people.  I've seen messages posted here, someone wondering if brain damage could result from an adrenal crisis - the answer is yes, if the blood glucose had gotten too low.  There are stories of people going down to 20 or 10, and coming out of it just perfectly though.  BLOOD GLUCOSE is the body's whole fuel system, it would take pages to discuss all it does.  Blood glucose is the brain's sole food (nothing else feeds the brain), it takes oxygen to the brain ... so low blood glucose, person's brain isn't getting enough oxygen, levels of 30 or below are known to cause brain damage.  Blood glucose is also the fuel for the sodium-potassium pump in everyone's body (CAH or not), this pump will not work unless there is sufficient glucose.  Blood glucose is needed for the blood glucose metabolism process in itself - if blood glucose goes low, glucose rapidly goes even lower as the body pushes hard to make more glucose.  Excess glucose (like after you eat) that is not needed by the body gets converted into glycogen & stored in the liver, then reconverted to glucose as needed (for the hours after meals, when you aren't eating).  CORTISOL is essential for the blood glucose metabolism process, without cortisol, blood glucose metabolism and transportation throughout the body (and to the brain!!) will not happen.  If a person is low on cortisol, then the whole glucose metabolism process and transportation through the bloodstream will not work well, or even not at all.   Regarding what MAGIC Foundation's CAH pamphlet says "a vomiting child, give salt water."  Ok, but you also need to be giving sugar fluids, else your well-salted child can still go into brain damage, coma .. death.   Even though salt can be absorbed 'through mouth linings' (even in a vomiting child), if you don't have glucose in the person - their sodium-potassium pump won't be working and the person can still become dehydrated because this pump isn't working to regulate the sodium-potassium balance in the cells (low sodium dehydration).  Glucose can also be purchased (and OTC) in forms of liquid and gel and instant glucose (that just goes inside the person's mouth, like between the cheek and teeth, if can't swallow or is vomiting).  Glucose (like salt) will also get into the bloodstream from these mouth linings.  When the body needs glucose, and can't find the sugar (from your food), and there is no glycogen stored in the liver (all used up) - the body then begins to make glucose from other components in the body (including protein and muscle ).  Children do not have the ability to store as much glycogen as adults, and have smaller bodies - so they can experience low blood glucose much quicker than an adult (like just overnight).   When a person is ill, much more blood glucose is needed as the body tries to fight off the illness (another of glucose's jobs), fever-fighting mechanisms also use blood glucose up.  So ... I keep blood glucose tablets on hand because if Amanda gets ill and isn't eating greating (or just not looking herself even), I give a glucose tablet.  And ... I myself, have on occasion taken one (when I feel light-headed, like when I'm so busy feeding everyone else that I don't yet have the hands to eat).