Please give Dr. Pierson's page a close read before your next vet visit. Arm yourself with both the hard facts and informed veterinary opinions about the risks involved in using this powerful drug.
And note too, especially, the suggestion at the bottom of her essay the wisdom of asking that "NO CONVENIA" be written on your cat's chart in red to make sure that it is very visible to any veterinarian caring for your cat. She also suggests adding "NO METACAM" on the chart. Read her page for the details - it could save you and your cat from a lot of unnecessary misery.
You can bet the next time we head to the vet, I'll be sharing with my vet - both orally and in writing on the chart - my insistence that these drugs are not acceptable.