“If Congress thought state-law suits posed an obstacle to its objectives, it surely would have enacted an express preemption provision at some point during the Food, Drug and Cosmetic Act’s 70 year history…Its silence on the issue, coupled with its certain awareness of the prevalence of state tort litigation, is powerful evidence that Congress did not intend FDA oversight to be the exclusive means of ensuring drug safety and effectiveness.”

Justice Thomas, in a concurring opinion, also dismissed the Wyeth preemption argument, calling it unconstitutional:

“Because such a sweeping approach to pre-emption leads to the illegitimate – and thus, unconstitutional – invalidation of state laws, I can no longer assent to a doctrine that preempts state laws merely because they ‘stand as an obstacle to the accomplishment and execution of the full purposes and objectives’ of federal law.”