Potential topical relief

Was talking to a friend the other day who has arthritis (osteo) and struggles with joint pain. His doctor prescribed something I wasn't aware of, but thought I'd share it in case it might bring some relief for some of you. I realize osteoarthritis is different from what we struggle with, but it still might provide some relief, especially on smaller joints.
It's a compounded cream, and therefore kind of expensive ($150/six ounces), but he said it was worth every penny - when he uses it he feels "normal" again. This is what he sent me:
6% Gabapentin
10% Ketoprofen
4% Lidocaine
Lipoderm (no measurement)
120 GM (no idea what that means, unless that's 120 grams of lipoderm? - the doc should know)
Apply one pump to affected joint twice daily as needed for pain.
I'm going to ask my doctor for a prescription - there's a compound pharmacy near me. Obviously I can't afford to use it everywhere there's pain, but if I could get a little relief in hands, elbows, feet when I'm trying to do things, it would be worth it.