A sales representative for Insys Therapeutics Inc., the opioid maker that has been the subject of mounting litigation of late, pleaded guilty in New Jersey on Wednesday to her part in an alleged scheme in which doctors were bribed to increase off-label prescriptions of painkiller Subsys.

The guilty plea comes as the state continues to pursue litigation against the Arizona-based pharmaceutical company, which has become the central target of the state’s efforts to combat opioid abuse.