If you can get a good Dr to help, the drug companies have excellent programs. I get Xeljanz free, it's a bit of paperwork from you and your Dr but worth the effort for sure.
I have Medicare also and before I said the wrong Meds i take xeljanz Now also for free, I took humira for free also, you have to fill out paperwork and your doctor's office can help. Don't be afraid to tell them you need help
None in South Africa that I am aware of - the only assistance is STATE Hospitals/RA clinics - and there although if not got the state pension card you pay a small amount, at least any blood tests, any other tests or problems that come up are covered including Doctors, the medication side of it is a problem as even if they prescribed what you were on privately, the medication is usually not available or supplied by the dispensary, so you end up going away with folic acid, normal OTC pain medication, quinine and calcium (as I have apparently osteoporos) But I say thank you anyway!
Google the medicine. Then go to the manufacturer's site. Name brand medicine sometimes have an available program that helps you pay for their drug(s). Also ask your pharmacy about discount programs.
I have applied to over one dozen places for help with Enbrel. Enbrel foundation was helping me until I went on Medicare and then they dropped me like a hot potato its the only thing that helps me, I have tried everything. My doctor doesn't care because I am on Medicare, no help there. Any suggestions?