Dec 12, 2018 FDA declines to approve Mallinckrodt's abuse-deterrent opioid painkiller FDA declines to approve Mallinckrodt’s abuse-deterrent opioid painkillerReuters Health News | December 12, 2018. The US Food and Drug Administration has declined to approve an abuse-deterrent version of Mallinckrodt ... read morePublished on 2018-12-12