A prospective, double-blind, placebo-controlled, randomized clinical trial in a tertiary care pediatric emergency department with an annual census of 80,000 visits per year. Patients will be randomized by a randomization table with block randomization in the pharmacy to the oral narcotic or placebo group, and the pharmacist will be the only person aware of the randomization status of the patient. Allocation concealment will be ensured by opaque, sealed envelopes kept in the Emergency Department Pharmacy. Guardians of patients age 2 to 17 years of age will be consented for enrollment.
