(AP) — A Kentucky-based health care company is suing to protect its name after being involuntarily drawn into the backlash over Rush Limbaugh’s derisive comments about a Georgetown law student.

Louisville-based Humana, the parent company of Concentra Health Services, filed on Thursday for a preliminary injunction to stop the Preval Group of Portland, Maine from using the name Concentra to market memory aid pills.

Humana said in court filings it received angry phone calls, emails and web postings after an ad for Concentra pills aired on Limbaugh’s show Monday. Concentra Health and the Preval Group are not related.

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