No, of course not. But the conservative jurist did side with the Ginsburg, Stevens, Kennedy, Souter, and Breyer in the case of Wyeth v. Levine.
The court ruled that FDA approval doesn't insulate drug companies from law suits. Thomas wrote a separate opinion taking shots at the court's use of pre-emption, letting federal law supercede state law. Still, it was an interesting ruling and surprising to see Thomas break from Alito, Scalia and Roberts.