Rimadyl is an effective pain medication, if it agrees with the dog. Short term usually is not problematic, however, long term could lead to various side effects such as GI distress and paradoxical effects, in example, agitation.
Tramadol is no longer recommended for pain relief for dogs, consult a veterinarian for details.
It is best to find a veterinarian who you trust and discuss all treatment options, I would not recommend spending money on supplements and over the counter medications unless a veterinarian that has examined your dog advises you to do so. You could cause more harm.
