Abnormal sleep is reported by more than half of rheumatoid arthritis patients, in addition to the traditional symptoms associated with the disease, such as morning stiffness, pain, and functional debility. When recording brain activity during sleep using electroencephalography or EEG. Sleep abnormalities have been found independent of pain and thus the mechanisms to account for disordered sleep in this population are unknown. The immune system, via pro-inflammatory cytokines, plays a major role in the development of rheumatoid arthritis. Pro-inflammatory cytokines are molecules that act as signals to stimulate activity of different arms of the immune system. New medications such as remicade (infliximab) have been developed which slow disease activity by blocking the activity of these pro-inflammatory cytokines. This is done by binding to the cytokine TNF and rendering it biologically inactive. Pro-inflammatory cytokines also appear to play a role in sleep. A number of basic and human studies have found that cytokines and sleep exhibit a bi-directional relationship. However, no study to date has explored this relationship in a rheumatoid arthritis population. Thus, this research study has the potential to test whether cytokines influence sleep in rheumatoid arthritis. We will determine if a single dose of a pro-inflammatory cytokine blocking medication (remicade) affects sleep in rheumatoid arthritis patients. Interested participants will undergo an eligibility interview to review in-depth subject participation, RA diagnosis, written Consent. Following eligibility, patients will undergo a single overnight sleep assessment lasting four nights at the General Clinical Research Center. After the adaption and baseline nights, on day 3, patients will be randomized to receive either 10 mg/kg of remicade or placebo and their sleep will be subsequently monitored for two additional nights ( post-infusion 1 and post-infusion 2).