Over the counter inflammation medication for dogs

My 10 yr old Lab Rocky, was attacked by my 2 yr old dog last night. I checked Rocky over and other than being exhausted from the fight, the only damage done seems to be about an inch and a half long scrap on his left front leg which did not appear to have broken the skin. Today, other than being plum tuckered out, his leg has a knot on it, no doubt from where the other dog clamped onto him. I was wondering if there is any over the counter medications one can give a dog for inflammation. Rocky weighs between 50-60 lbs (he is a smaller lab).
Also wondering what over the counter things might help older dogs who are a bit arthritic as winter is coming on and it seems to bother both Rocky and a 15 yr old dog I have somewhat.
TYVM!

[Aleda M Cheng, D.V.M., C.V.A]

The only over the counter anti-inflammatory that is safe in dogs is Ascriptin (enteric coated aspirin), at 325 mg. orally, twice daily.  But even this medication can sometimes cause gastric ulcers if given on an empty stomach, or if the dog has a propensity toward ulceration.  

A good supplement for degenerative joint disease is one that contains: glucosamine and chondroitin, with panniculus mussel, and other vitamins and minerals.  There are many brands for humans that can be safely used in dogs, when scaled down to the size of the dog.  A 60 pound dog can have an adult human dose.