- To determine whether armodafinil is more effective than placebo in reducing fatigue as measured by standard actigraphy summary statistics including total sleep time (TST), wake after sleep onset (WASO), sleep latency, number of awakenings, daytime sleep time, mean daytime activity, peak activity, acrophase, and circadian mesor at week 1 of screening, week 7 of study treatment, and study completion (week 13).