Research Design: The study is a double blind, placebo-controlled parallel groups prospective study of duloxetine versus placebo. Subjects will be randomized to the investigational treatment group (duloxetine) or the placebo group. At the time of enrollment they will be randomly assigned to study drug or placebo by block randomization for order in a 1:1 ratio. Subjects will be provided acetominophen as a rescue analgesic to use if they feel their pain is not adequately controlled. The examiners and subjects will be blind to the group assignment.