Louisiana Attorney General Liz Murrill announced Thursday she is investigating whether pharmaceutical giant CVS improperly used customers' personal information to send out text messages lobbying against a proposed state law.

CVS sent text messages to customers urging them to contact lawmakers about a controversial bill on pharmacy benefits managers. Louisiana Attorney General Liz Murrill says she's investigating whether that was improper.

The Louisiana Attorney General’s Office has issued a cease and desist letter to CVS, accusing the company of improperly using the personal contact information of Louisiana citizens for political messaging.