This can be surprising but research have shown that some medications used in combating arthritis may increase the risk of getting cancer. On the other hand, some medications used in the treatment of cancer can as well lead to arthritis. There are also drugs used to effectively treat both severe conditions.
Example of such drugs include: non-steroidal anti-inflammatory drugs, corticosteroid injections, tumor necrosis factor. Disease modifying anti-rheumatic drugs have been connected to causing cancers of the urinary tract and bladder.