A Florida man has sued Johnson & Johnson and a subsidiary for allegedly failing to warn him of complications that could be caused by drug-coated stents placed in his arteries.

The allegations come as the Food and Drug Administration cited studies this week showing drug-coated stent recipients face a small but significant blood clot risk. The lattice-shaped tubes prop open clogged arteries. Unlike older, bare-metal stents, newer ones use drugs that dissolve into the bloodstream to prevent tissue regrowth.