Patients were randomly assigned to receive milnacipran or placebo for 6 weeks, followed by a 1-week washout and then crossover to the other arm for another 6 weeks. The overall trial lasted 13 weeks and was conducted between July 2011 and May 2013. Assessments were performed at each visit.

Kim JL, Rele S, Marks DM, Masand PS, Yerramsetty P, Millet RA, Keefe RS, Patkar AA. Effects of milnacipran on neurocognition, pain, and fatigue in fibromyalgia:  A 13-week, randomized, placebo-controlled, crossover trial.  The Primary Care Companion for CNS Disorders, 2013; 15(6).