I have to agree on the comments made on steriods, Ash was on them for renal failure and Ellie was on them for her mouth condition, like all drugs they have their good and bad things, but cats tolerate them extremely well, so much better than humans, one side effect is it lowers their immunity ,so be aware of that, but if your vet has recommended them i would go for it if i were you, in the long run will help your cat so much.