A Chinese herbal remedy that has been used for centuries to help treat inflammatory diseases may have potential as a treatment for rheumatoid arthritis (RA), a new study suggests. The herb, known as "thunder god vine," is an extract of the medicinal plant Tripterygium wilfordii Hook F (TwHF). For the study, researchers gave RA patients either the TwHF extract or Azulfidine, a prescription anti-inflammatory drug. At the end of the trial, about 65 percent of those taking the herbal extract showed...