The attorneys general of 41 US 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.

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