These are the protein based meds (mostly antibodies) that block TNF-alpha factor, which is involved in the inflammatory response in autoimmune disorders. They were first used for rheumatoid arthritis, then Crohn's and UC. The most common ones are Remicade, Humira, Simponi, and Cimzia. There also is Embrel for arthritic conditions only. There are more in the pipeline. So far, they all require IV infusion or injection, and are quite expensive. There is some very slight increased risk for lymphoma and other cancers, but they are not sure if it is the drug or the autoimmune disease, since the same risks are elevated as a group, particularly with RA patients. But, they are coming into favor as steroid sparing, and it is widely known that long term use of steroids is very detrimental with irreversible side effects.
There are some supplements with action along the same pathways, such as turmeric and green tea, but much less effect. So, it is not a completely artificial concept.
http://en.wikipedia.org/wiki/TNF_inhibitorJan