Louisiana Attorney General Liz Murrill plans to send a cease and desist letter to CVS for mass text messages sent to customers lobbying against legislation and is opening an investigation into whether the pharmaceutical giant improperly used customers’ personal information.

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.