Clonazepam, an anxiety drug, is being voluntarily recalled for the potential to cause a “life-threatening” event.

Additional packages of clonazepam, a prescription medication used to treat seizures and anxiety, mislabeled with the incorrect strength have been added to a voluntary recall, according to the U.S. Food and Drug Administration.

Sixteen lots of clonazepam orally disintegrating tablets have been recalled because of a packaging error that could have life-threatening consequences.