Lidocaine Infusion Decreases Pain Scores in a Fibromyalgia Pain Population with Signifi cant Differential Pain Relief Secondary to Smoking Status

Study Objective: Our hypothesis is that systemic lidocaine can significantly reduce chronic pain associated with fibromyalgia. A secondary goal of the study is to determine if other patient demographics can affect the response to IV lidocaine. Design: Retrospective chart review Setting: Outpatient pain clinic Patients: 55 patients being treated for fibromyalgia by lidocaine infusion Interventions: Intravenous infusion of lidocaine 5mg/kg over 1 hour Measurements: Two-tailed paired t-tests (α=0.05) were performed to test for significant change from pre- to post-infusion in BPI, PI, and VAS scores. Smoking status and race classification were also identified.