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.

Murrill also said she plans to issue a cease-and-desist letter to the company to stop the messages.

As lawmakers debated a now-failed bill on Wednesday they held up screenshots of text messages sent by CVS.

“Last minute legislation in Louisiana threatens to close your CVS Pharmacy — your medication cost may go up and your pharmacist may lose their job,” one such text, obtained by The Associated Press, read.