The Justice Department on Tuesday announced it is suing Walmart, accusing the company of helping to fuel the U.S. opioid crisis by unlawfully distributing controlled substances at its pharmacies around the country.

More than two decades after it started marketing OxyContin, Purdue Pharma on Tuesday admitted its tactics contributed to the nation’s deadly opioid epidemic that has been blamed for hundreds of thousands of American deaths.

Purdue Pharma, the company that makes OxyContin, will plead guilty to three federal criminal charges as part of a settlement of more than $8 billion.

John Kapoor, the founder of US drug maker Insys, was sentenced to five and a half years in prison on Thursday for helping fuel America's deadly opioid crisis.

Opioid overdose deaths have spiked in the wake of automotive assembly plant closures across the US South and Midwest, a new study suggests.

Leading US pharmaceutical companies go on trial Monday charged with stoking the opioid epidemic that has ravaged American communities.

OxyContin maker Purdue Pharma steered up to $13 billion in profits to the company’s controlling Sackler family, according to U.S. states.