Tumor necrosis factor inhibitors such as etanercept (Enbrel) or infliximab (Remicade) are some of the newest and most expensive drugs available to treat rheumatoid arthritis. Because they are so effective for many people with RA, the numbers of people taking them has been growing significantly over the last few years, despite the very high cost of the drugs and the risk of harmful side effects such as serious infections and several types of skin, lung, breast and blood cancers.
A new study...

