 This study is being conducted in order to determine if the FDA-approved drug Modafinil can improve cognitive function in patients with lupus. Modafinil is currently being used to treat excessive sleepiness caused by certain sleep disorders. It has also been shown to improve attention and concentration in some people who dont have lupus or sleep disorders. This study hopes to determine if Modafinil can be used safely and effectively in lupus patients, and improve their quality of life. No medications currently exist for the treatment of lupus-associated cognitive dysfunction. 