Silberstein, Stephen D Tramadol/acetaminophen for the treatment of acute migraine pain: findings of a randomized, placebo-controlled trial. [electronic resource] - Headache - 1317-27 p. digital Publication Type: Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't ISSN: 0017-8748 Standard No.: 10.1111/j.1526-4610.2005.00264.x doi Subjects--Topical Terms: Acetaminophen--adverse effectsAcute DiseaseAdultAnalgesics, Non-Narcotic--adverse effectsAnalgesics, Opioid--adverse effectsDouble-Blind MethodDrug CombinationsFemaleHumansMaleMiddle AgedMigraine Disorders--drug therapyPain MeasurementTramadol--adverse effects