A warning for users of epi pens — 13 lots of Mylan's Epipen and Epipen Jr. are being voluntarily recalled by the manufacturer.
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According to the FDA, the pens have a defective part that could keep them from activating.
Epipens are used to give an emergency injection of epinephrine to treat life-threatening allergic reactions.
The recalled lots were distributed between December 2015 and July 2016.
Lot numbers of the recalled devices can be found on the FDA website.