I have had great luck with low dose naltrexone for inflammation. It is supposed to work by modulating the immune system. For me 6 years into long covid, it took my pain levels down about 50% after 6 months. I have now been on it over 1 year and have less pain and more energy...not back to pre covid levels but I can now walk about a mile a day. I still have to pace myself or I will crash and still take an afternoon lie down to refresh/rest and go to bed early after dinner but most of the day, every day, I can do things again.

It does take several months to work up to a dose that works on naltrexone so give yourself time if you try it. It can give you insomnia or make you sleepy so I had to vary the time of day I took it as higher doses affected me differently but at 4.5 mg in the morning, it is working for me.