Medical Editor: Jay W. Marks, MD. A couple of years ago an episode of the popular TV series Grey's Anatomy featured a woman with two uteruses (or uteri). This unusual condition does, in fact, occur as a result of abnormal fetal development.
Currently, EpiPens expire 18 months from date of manufacturing. Facing criticism for the drug's rapidly rising price, Bresch said the company hopes the expiration date can be extended to a minimum of 24 months.
All expired Epipens that were no more than 24 months past the expiration date contained more than 90% of the labeled epinephrine dose. The expired epipens that were more than 24 months past the expiration date were discolored and contained less then the recommended dosages. The bottom line is that if you are in anaphylaxis with only an expired Epipen available, you should immediately use it, especially if its less than 24 months after the expiration date. But all expired epipens should be replaced as the date arrives.