Final answer:
Epinephrine auto-injectors are indicated for patients with signs and symptoms of anaphylaxis.
Step-by-step explanation:
Epinephrine auto-injectors are indicated for patients with signs and symptoms of anaphylaxis. Anaphylaxis is a severe allergic reaction that can be life-threatening if left untreated. Epinephrine helps to constrict blood vessels, relax bronchial smooth muscle, and reduce swelling, thereby countering the effects of anaphylaxis and potentially saving lives.