It has become an all-too-familiar story in schools across the country: a child eats a peanut or is stung by a bee and suffers an immediate, life-threatening allergic reaction known as anaphylaxis. If parents and school authorities know about the allergy and a doctor’s prescription is on file, a nurse can quickly give an injection of epinephrine, saving the child’s life. But school nurses in many districts face an agonizing choice if a child without a prescription develops a sudden reaction to an undiagnosed allergy. Should they inject epinephrine and risk losing their nursing license for dispensing it without a prescription, or call 911 and pray the paramedics arrive in time?