Baxter International Inc. was named in a complaint for improperly marketing opioid drugs and revealed an internal probe into the medical supplier’s accounting, sending the company’s shares down.

Members of the wealthy Sackler family behind Purdue Pharma LP pushed the company to boost sales of OxyContin and other opioids even as questions emerged about the extent the drugmaker’s painkillers were being abused, Massachusetts’ attorney general alleged.

A federal judge sentenced Aegerion for improperly marketing a cholesterol drug and ordered that some of the $40.1 million it agreed to pay to resolve a U.S. investigation go to the victims.