Three years has come and gone since FDA published its Federal Register Notice (here) requiring drug companies to reformulate their acetaminophen (APAP)-containing combination drug products to contain no more than 325mg of APAP per dosage unit. FDA gave manufacturers three years to make the change or face withdraw of approval of their applicants. In an announcement posted at the very end of the day yesterday, FDA gave final notice that “[I]n the near future we intend to institute proceedings to withdraw approval of prescription combination drug products containing more than 325 mg of acetaminophen per dosage unit that remain on the market.”

With little activity seen in 2013 in the enforcement arena for marketed unapproved drug products, FDA will publish two Federal Register (FR) notices on January 10, 2014 addressing enforcement action for a number of products.