I like and use Torbutol for pain when the cats need it ... but again, your vet is the best guide here.
Marge, I was thinking about limiting Sammy's activity levels which the vet may also suggest that you do ... with kittens (and their parents) being such a large part of my own home, there are indeed times when I must confine them for this or that reason. When these times happen, I find that an extra-large dog crate is perfect. You can place a small litter box as well as hang food and water dishes, you can put a comfy cat bed and toys in with but it very effectively limits the amount of space the cat has to ambulate. I have two at the moment and am thinking of purchasing a third. I got the ones I have at Wal-Mart for about $50 - $60 I think. They are easy to handle, lightweight and easy to port around if you need to. It might be a solution for you to consider.
Best of luck with your little Sammy. I sincerely hope this is something easy to treat and quick to heal.
Yours from the heart,