This study compares the efficacy of five oral analgesics: 5 mg oxycodone + 325 mg acetaminophen, 5 mg hydrocodone + 300 mg acetaminophen, 30 mg codeine + 300 mg acetaminophen, 400 mg ibuprofen + 1000 mg acetaminophen, and 800 mg ibuprofen + 1000 mg acetaminophen for the treatment of patients with acute musculoskeletal pain who present to the Emergency Department (ED).