Action star Chuck Norris is taking action after his wife, Gena Norris, was allegedly poisoned by a chemical used in MRI imaging. The AP reports that the former “Walker, Texas Ranger” star filed a lawsuit today in California against medical device manufacturers.

“Gadolinium that doctors injected into Gena Norris to improve the clarity of her MRIs have left her weak and tired and with debilitating bouts of pain and a burning sensation, the suit filed in San Francisco Superior Court says,” the AP reports. “Gadolinium is a metal found in so-called contrast agents used in many MRIs. Studies have shown it is retained by organs such as the brain, bones and skin. The American College of Radiology said in a statement last year that gadolinium-based contrast agents have been used for diagnosis and treatment guidance in more than 300 million patients worldwide since the late 1980s and provide ‘crucial, life-saving medical information.’”

The U.S. Food and Drug Administration said earlier this year that it did not find evidence that retained gadolinium was harmful. But the law firm representing the Norrises has filed a number of gadolinium-related suits in recent weeks.

Todd Walburg, an attorney for the Norrises, commented: “One of the problems is this is a very misdiagnosed and underdiagnosed condition.”

“The lawsuit accuses several manufacturers of gadolinium contrast agents of knowing about their risks, but failing to warn consumers,” the story reports. “It seeks more than $10 million in damages, saying the [Norrises] have had to spend millions of dollars on treatment for Gena Norris.”