Effectiveness
None of these devices prevent future episodes of anaphylaxis, but patients who experience severe or life-threatening reactions may be treated with a series of allergy injections composed of increasing concentrations of naturally occurring substances such as venom to provide excellent and usually lifelong protections against adverse effects of future insect stings: the initial injections have a very low concentration, usually 1 ppb or less.
Read more about this topic: Epinephrine Autoinjector