Supreme Court to decide if Fosamax users can sue Merck over bone fractures Hundreds of patients say Merck failed to warn of possible Fosamax danger.

Like millions of Americans suffering from bone loss, Lorice Cortez embraced the prescription drug Fosamax with the hope of stopping osteoporosis in its tracks.

But in August 2009 -- a decade after she began regularly taking the medicine produced by pharmaceutical giant Merck -- Cortez said she experienced a painful and debilitating side effect: a spontaneous broken leg.

As the 70-year-old turned to unlock the front door of her house, she heard a “popping sound, then suddenly felt her left leg give out from beneath her,” according to court documents. In an instant, with no trauma or impact, she completely fractured her thighbone, requiring surgery to repair the break.

Monday the Supreme Court hears arguments in a case brought by Cortez and more than 500 Fosamax users from 45 states trying to sue Merck for damages after experiencing atypical femoral fractures, which they allege were caused by the drug.

The plaintiffs contend the company failed to warn them or their doctors of the danger, despite early evidence suggesting the increased potential for spontaneous bone breaks without any previous stress.

Merck does not dispute the heightened risk of femoral fractures in long-term users of Fosamax and has included a warning with prescriptions since 2010. But the company argues it cannot be held liable for damages in state courts because the Food and Drug Administration in 2009 rejected a proposed warning to patients.

“If a manufacturer proposes to warn about a risk, discloses what it knows about that risk, and gets rebuffed by the FDA, failure-to-warn claims against it are preempted as a matter of law,” Merck argues in its brief filed with the high court.

A federal district court and a circuit court of appeals divided on whether the FDA’s decision in 2009 preempts the patients’ claims or whether a jury must consider the facts of the case, weighing the FDA’s intent and whether Merck should have proposed different warning language.

Cortez “would not have used Fosamax for so many years had [Merck] properly disclosed the risks associated with its long-term use,” her lawyers wrote in a suit against the company.

Manufacturers are required by law to inform patients of potential adverse reactions to their drugs as soon as reasonable evidence exists. But the FDA has ultimate authority to approve or reject the wording that appears on drug labels.

In a 2008 application to the FDA, Merck proposed revising the warning language for Fosamax, describing a heightened risk of “stress fractures.”

One year later, the FDA rejected that draft language, saying the warning was “not warranted and is not adequately supported by the available literature” and asked for revised language.

Merck said the FDA’s conclusion, based on available evidence at the time, means the company cannot be held liable for failing to warn consumers as required under state law because the federal government wouldn’t allow it.

The plaintiffs allege Merck misled the FDA.

“Merck never proposed a warning of ‘atypical femoral fractures’ to the FDA,” the plaintiffs argue in their brief to the Supreme Court. “In an attempt to minimize the risk, Merck proposed to warn of ‘stress fractures,’ which are widely understood as minor fractures far less serious than atypical femoral fractures.”

Currently, Fosamax carries a warning of “atypical femoral fractures” -- the type of injury Cortez and hundreds of others endured -- making no mention of the term “stress fractures.” The FDA mandated the change in 2010 after mounting evidence of a link to the drug.

“The FDA was so concerned -- and had no response back from Merck -- that they convened their own panel to reexamine the evidence,” said Suzanne Robotti, founder and president of MedShadow Foundation, a nonprofit consumer advocacy group. “It recommended that a strong warning be put on there specifically describing spontaneous fractures. It was Merck’s responsibility to propose that warning themselves.”

The company maintains that there was insufficient evidence prior to 2010 to support a stronger warning for Fosamax. In an amicus brief filed to the Supreme Court, the Trump administration’s FDA backs up their claim.

Merck has “incontrovertible proof, from the agency’s own mouth, that it would not have authorized respondents’ proposed warning until October 2010,” the company argues to the court.

“If manufacturers must face tort suits, even when the FDA has made clear that no warning is necessary, they will continue to face an onslaught of troubling coercive litigation,” Merck says.

Patient advocates say a jury should be allowed to decide.

“If they are successful with this, other drug companies would obviously follow the exact same path: they would put in language to the FDA that they anticipate and hope would be rejected," said MedShadow's Robotti. "But it’s really not the FDA’s job to write the drug label, it’s the pharmaceutical company’s job to write the drug label."

“It would be a disaster for patient rights, for patient protection,” Robotti said.