IV Acetaminophen and Post-Tonsillectomy Pain

Inclusion Criteria: 1. The subject is age 3 to 10 years (inclusive) 2. The subject weighs more than 10.0 kg (inclusive of the tenth kilogram) 3. The subject is scheduled for the following: Elective tonsillectomy or tonsillectomy with adenoidectomy scheduled on an outpatient basis, with acceptable inclusion of patients also having PETs and/or EUA of ear 4. The subject is ASA patient classification I-II 5. The subject's legally authorized representative has given written informed consent to participate in the study and when appropriate, the subject has given assent or consent to participate. Exclusion Criteria: 1. Additional surgical procedures are being performed concurrently; 2. The subject is ASA classification \> II; 3. The subject has pre-existing allergy or known hypersensitivity to acetaminophen; 4. The subject receives midazolam as a premedication; 5. The subject has a history of chronic malnutrition; 6. The subject has any other condition, which in the opinion of the principal investigator, would not be suitable for participation in the study