The opioid industry expanded in the 1990s in response to the medical community’s push to better treat pain and chronic pain with drugs such as oxycodone.

The attorneys general of 41 U.S. states said Tuesday that they’re banding together to investigate the makers and distributors of powerful opioid painkillers that have, over the past decade, led to a spike in opiate addictions and overdose deaths.

The coalition issued subpoenas seeking information from opioid manufacturers Endo International, Janssen Pharmaceuticals, Teva Pharmaceuticals and Allergan, as well as additional subpoenas to Purdue Pharma. In addition, the group is demanding documents from distribution companies AmerisourceBergen, Cardinal Health and McKesson.

“Our subpoenas and letters seek to uncover whether or not there was deception involved, if manufacturers misled doctors and patients about the efficacy and addictive power of these drugs,” New York Attorney General Eric Schneiderman said during his press conference announcing the investigation. “We will examine their marketing practices both to the medical community and the public.”

The pharmaceutical industry already faces dozens of lawsuits brought by cities, counties and states — including Ohio, Missouri and Oklahoma. Some are trying to recoup the costs incurred from the surge in emergency response from spikes in opioid-related…