UnitedHealth Group's multibillion-dollar pharmacy benefit manager, Optum Rx, is suing five Kentucky counties in an attempt to force them out of national opioid litigation against the company.

Two new studies from Karolinska Institutet in Sweden have investigated how mutations that occur in muscles and blood vessels over time can affect aging.

Dining under palm trees on a patio at Mar-a-Lago in December, President-elect Donald Trump reassured chief executives at pharmaceutical giants Eli Lilly and Pfizer that anti-vaccine activist Robert F.