If someone is having an anaphylactic reaction, and all you have on hand is a recently expired EpiPen, then use it so long as it is not discolored and does not contain any particles. There is minimal risk in using a recently expired EpiPen, but the benefits are significant. But check the clear viewing window of the pen and if you notice it is discolored or contains particles then don’t use it as the solution may have oxidized, making it less effective.