I do take Mobic and it helps somewhat. When I had tendonitis in my arm(elbow, shoulder and wrist) last week, it took some of the pain away, but the pain in my neck and other joints, is still the same.
I think Mobic helps a "fresh" inflamation, but not the chronic one. At least, that is my experience.
Of course it could work totally different for you.
Good luck, I hope it will take your pain away.
I may have been dealt a bad hand, but at least I'm still playing with a full deck. ( most of the time anyway).