Study Finds EpiPens effective years after expiration date

Epinephrine auto-injectors can still deliver an effective dose long after they have expired, according to a new study.

Study author, Lee Cantrell, Professor of Medicine and Pharmacy at the University of California, San Diego, and his team measured 40 expired EpiPens.

They found that 29 months after expiration, the EpiPens still contained at least 90% of their stated amount of epinephrine.

EpiPens more than four years past the printed expiration date had more than 84% of the medication, enough to prevent anaphylactic shock.

The manufacturer advises patients to replace the life-saving devices annually. However, this new research builds on previous findings that epinephrine auto-injectors have a much longer shelf life than labels state.

“If someone has an allergic reaction, there’s still a dose that would be therapeutic in there,” Cantrell said. “If this is all you have, this is better than nothing.”

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