The suit claims that Astin prescribed painkillers, steroids and muscle relaxants to Benoit from June 2000 to June 23, 2007 – the day Benoit killed his family and then hanged himself.
The suit alleges that Astin has a responsibility to monitor Benoit and warn him of the side effects of the drugs. The suit also includes an affidavit by a veteran Long Island sports medicine doctor, who reviewed Benoit's medical records.
The physician, Dr. Gary Wadler, found that Astin prescribed Benoit the medication without proper diagnosis or monitoring. The drugs ultimately caused Benoit's "mental, physical, emotional and/or behavioral health to deteriorate to extent he killed" his family, Wadler said.
"It is my opinion, to a reasonable degree of medical certainty and medical probability, that Astin was negligent in his care and treatment of Benoit," wrote Wadler, a member of the World Anti-Doping Agency's board.
The suit seeks financial damages to cover the "full value" of the deceased lives, along with money for pain, suffering and expenses. The suit requests a jury trial.
Nancy Benoit's parents, Maureen and Paul Toffoloni of Florida, filed the suit in U.S. District Court in Newnan. The Toffoloni's handle Nancy and Daniel Benoit's estate.
Earlier this year, Astin pleaded guilty to writing 175 illegal prescriptions for 19 patients, including two that died of drug overdoses. Federal prosecutors argued that Astin illegally prescribed drugs such as Percocet, Oxycontin, Xanax and Lorcet to professional wrestlers who eventually became addicted to them.