Auvi–Q, a form of adrenaline auto injector has recently come out with a lower dose injector for emergency treatment of anaphylaxis in children weighing less than 33 pounds.  It contains .1 mg of epinephrine and has a shorter needle (to avoid hitting the bone when injected).  Previous to this the only other available doses were .15 mg for people 30 to 60 pounds and .30 mg for people over 60 pounds.