There is a recall going on right now for EpiPens manufactured in the last twelve months. A defect found in some EpiPens may cause them not to work. Here is the manufacturer's web page for the recall. http://www.mylan.com/epipenrecall If you or your family carry these, you should go to the website and check the lot number to see if your pen has been recalled. This is more likely to affect outdoorsmen than most other groups of people.