A nurse is providing teaching for a client who received a prescription for an epinephrine autoinjector to treat anaphylaxis. Which of the following information should the nurse include in the teaching?

Use the autoinjector if shortness of breath is the only symptom of anaphylaxis.

Use the second autoinjector immediately after the first dose.

Hold the autoinjector firmly down for 10 seconds while injecting.

Inject into the buttock or deltoid.