Study Evaluating DVS SR in Patients With Fibromyalgia Syndrome

Inclusion Criteria: * Outpatients who have completed double-blind treatment in study 3151A4-327 for fibromyalgia Syndrome with no major protocol violations and no events that would preclude the patient's entry into the long-term open-label study. * Women of childbearing potential must have a negative serum pregnancy test result at study start. Exclusion criteria: * Presence of any new/and or clinically important medical condition that might compromise patient's safety. * Use of prohibited treatment. * Meets any of the exclusion criteria listed for study 3151A4-327.