Senator, blocking subpoena of Teva in opioids probe, says matter should be left to courts

WASHINGTON — Claire McCaskill, the Democratic senator from Missouri, has spent the past 18 months investigating drug makers and distributors to determine what role they played in furthering the opioid crisis.

But her investigation into the Israeli drug company Teva — the world’s largest manufacturer of generic drugs — has largely been thwarted. For one, McCaskill said, Teva has stonewalled her efforts and refused requests to turn over documents detailing its efforts to prevent drug misuse and audits of suspicious orders for opioids.