 The purpose of this study is to evaluate the effectiveness and safety of tramadol HClacetaminophen as a pain medication compared with placebo in the treatment of acute pain from a migraine headache. Although tramadol HClacetaminophen is approved to treat acute pain, it is not approved for the treatment of acute pain associated with migraine headache. The study hypothesis is that tramadol HClacetaminophen is safe and effective as a pain medication in the treatment of acute pain associated with a migraine headache. 