What are the reasons a doctor will prescribe an epi-pen?

Severe allergies: Epinephrine auto-injectors like the Epipen (epinephrine) are prescribed for individuals with a history of severe allergic reactions (anaphylaxis). They are also prescribed sometimes for people on allergy shots as a precautionary measure.

Epi-Pen: For a serious allergic reaction known as anaphylaxis. We do also prescribe for patients with very severe persistent asthma as well.