The multi-billion-dollar payment is meant to resolve claims that the drugmaker's pain medication, OxyContin, caused an opioid crisis.

All 50 states, D.C., and four U.S. territories signed off on the multi-billion dollar settlement proposal with OxyContin maker Purdue Pharma in litigation over Purdue's alleged role in America's opioid addiction crisis.

The attorneys general of all 50 U.S. states, Washington, D.C. and four U.S. territories have agreed to a $7.4 billion settlement with bankrupt drugmaker Purdue Pharma, New Jersey Attorney General Matthew Platkin said on Monday.