SAN JUAN, Puerto Rico - The first warning sign came when a sharp-eyed worker sorting pills noticed that the odd blue flecks dotting the finished drug capsules matched the paint on the factory doors.
After the flecks were spotted again on the capsules, a blood-pressure medication called Diltiazem, the plant began placing covers over drugs in carts in its manufacturing areas.
Tainted pills hit U.S. mainland - Health care - MSNBC.com