There have been several treatments in the past for severe allergic reactions and for anaphylaxis. However, the most recent and popular one being the EpiPen.
The EpiPen is a pen-like tube filled with epinephrine with a minuscule syringe on one end. Its purpose is to provide patients and the people around them with an emergency dose of epinephrine in the case of an unprecedented reaction.
It was first developed mid-1970s and was approved for marketing by the FDA in 1987.