Metoclopramide for Post Traumatic Headache

Inclusion Criteria: Included patients will be adults who meet International Classification of Headache Disorders criteria for acute post-traumatic headache. These are as follows: * Traumatic injury to the head has occurred * Headache has developed within 7 days of injury to the head * Headache is not better accounted for by another diagnosis (eg, previous history of migraine or tension-type headache) The headache must be rated as moderate or severe in intensity at the time of initial evaluation. Exclusion Criteria: Patients will be excluded if more than ten days have elapsed since the head trauma, if the headache has already been treated with an anti-dopaminergic medication, or for medication contra-indications including pheochromocytoma, seizure disorder, Parkinson's disease, use of MAO inhibitors, and use of anti-rejection transplant medications.