ONE DOES NOT SIMPLY 'WHIP OUT A METHOTREXATE'; ONE MUST MAKE SURE THERE ARE OPTIMAL LIGHTING CONDITIONS, MAKE SURE YOU HAVE THE BAND-AID AND DISINFECTANT PADS, MAKE SURE THE NEEDLE IS NOT DULLED OR BENT, MAKE SURE YOU HAVE THE SUFFICIENT AMOUNT OF MEDICINE, MAKE SURE THE INJECTOR IN SKILLED ENOUGH, MAKE SURE THEY DON'T HIT A CAPILLARY, AND MAKE SURE THEY HAVE ENOUGH SPACE.