Yes, I also heard to use the 1 inch syringe and go into the skin that full 1 inch. To press down on the upper thigh, and go the full way in (to make sure you get it into the muscle). I believe this, and will always follow it. If you don't get it into the muscle it won't work. 3 endos have told me the IM can't be relied on totally anyway (they've seen too many times when it didn't work) AND that it most probably won't work at all if the person continues to vomit after the injection is given OR has already lost enough bodily fluids before the injection is given. The last endo I saw (a brilliant 65 year-old male endo, director of an endo dept, with many CAH patients) who voluntarily spoke in great detail about adrenal crisis matters, blood glucose, insulin, salt/water balance, etc. This doctor also said "no, no, no - do not wait until the fever is 101 or above to give extra cortef - give it at the first sign of a fever or illness AND also give extra the first two days of even a cold."