Some people have had great success using kratom to alleviate both pain and addiction. It can be tricky to get high quality and correct doses, but it is an alternative.

Also acupuncture can be a great help.
I’ve heard good things about pulse-EMFs and stem cell therapy.

Finally, I know of many people who have eliminated pain of many kinds using REDjuvenator red light therapy. I like this because it’s non-invasive, you can do it at home, and you can’t overdo it. The success stories seem too good to be true, but they are! At the very least, get free sunshine every day on your bare skin - it does wonders for your health.