Ok, this is anecdotal for certain, but an honest and lived experience.

I've developed osteoarthritis in various parts of my body as I aged, my wife has rheumatoid arthritis. She takes some non-opioid prescription meds (with unfortunate long-term effects) for it, but they're anti-inflammatories and don't do much for the base pain. I introduced her to CBD oils, ointments, salves, and tinctures. She now takes an eye dropper of tincture every night before bed which allows her to sleep better, and has a variety of tropicals (lotion, gel, roll-on, stick (like deodorant)) for localized treatment and flare ups in both trees and muscle tension. She also does not like being high at all, so she gets hemp-based products online (Lazerus Naturals, for the curious).

On my end, I enjoy the high as (with a sativa) it helps me to focus and get things done (undiagnosed ADD checking in) as well as killing the pain in my body. I've also found that the THC component gives a boost to the pain-'killing' effect, but that could just be the drugs talking.

Marijuana aside, I've also learned the benefits of Turmeric for arthritis pain. There are days I forget to take Turmeric and am soon reminded when the invisible gremlins start stabbing my hands in the evening. See if you can get her to add that to her supplements and she might get a bit more relief.

I'm a skeptic and scientist by nature, and endured various days of pain just to make sure the stuff I am taking is actually doing something, so maybe I can save someone else the hassle. Keep in mind that some things are a cumulative effect, meaning you'll need to take them for a few days to really propagate through the system for best effect.

Best of luck!

Weed sucks for pain.

Opiates are the only thing I've found that makes any difference at all.

Not everyone is you.