Drugs used in the treatment of rheumatoid arthritis and other conditions. Gold compounds are given by injection to treat rheumatoid arthritis not adequately treated by other anti¬ inflammatory drugs. Gold sodium thiomalate is also used to treat psoriatic arthritis and Felty syndrome, a form of rheumatoid arthritis that includes splenomegaly (enlarged spleen) and leukopenia (reduced white blood cell count).