Mallinckrodt's woes persist as reformulated opioid painkiller fails to pass FDA muster

The FDA’s reluctance with prescription painkillers at a time the United States is swept by a tsunami of opioid abuse, overdose and addiction was on full display on Wednesday, when the regulator rejected Mallinckrodt’s $MNK abuse-deterrent opioid painkiller, soliciting more data from the UK drugmaker.