Is EpiPen used for heart attacks? What other uses than allergic reactions?

An EpiPen is used for anaphylaxis, an acute, potentially fatal, multiorgan system reaction caused by the release of chemical mediators from mast cells and basophils, typically due to an immunologic reaction.

Hi Mary, it has no other use use, that I am aware of, than in severe allergic reactions where a fast response is required. Heart attacks where epinephrine/adrenaline is used require a direct injection to the affected muscle rather than a slower subcutaneous approach. Intravenous and subcutaneous methods do not work if the heart is not circulating blood.