Hi Bright Spark,
There is a drug called Low Dose Naltrexone, it has no side effects that I know of, and I have been taking it for a year now. He may wish to do lots and lots of research and there's plenty out there, I decided after 3 months of reading that I had nothing to lose.
Some GPs will prescribe it, some won't but that doesn't matter because you can get it privately at not great cost.
Here is the research trust, they are about multiple sclerosis for the most part but will help any one interested in LDN.
http://www.ldnresearchtrust.org/
There are lots of scholarly articles on RA and LDN
http://autoimmunedisease.suite101.com/article. cfm/low_dose_naltrexone
and this book is well worth the read...
Up the Creek with a Paddle: Beat MS and Many Autoimmune Disorders with Low Dose Naltrexone (LDN): Mary Anne Boyle Bradley: Amazon.co.uk: Books.
Mary Annes uncle was treated with LDN for RA.
I wouldn't be without the stuff myself, I started on 1ml liquid and built up to 3 ml and I wake up feeling human now instead of wishing I was dead.
Best Wishes to Your Friend.
L. x