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.
âMany drugs stored under reasonable conditions in their original unopened containers retain 90 percent of their potency for at least 5 years after the expiration date on the label, and sometimes much longer,â The Medical Letter report concludes, with one important caveat: âEpinephrine in EpiPen is an important exceptionâ as these products gradually lose potency once the expiration date passes.