Optimizing Pain Treatment in Children On Mechanical Ventilation

Inclusion Criteria:

1. At least 2 months of age to 17 years 6 months; AND
2. Acute Respiratory Failure requiring endotracheal intubation; AND
3. Opioid infusion planned or started; AND
4. Expected duration of Invasive Mechanical Ventilation \> 48 hours

Exclusion Criteria:

1. History of allergic-type reaction to either acetaminophen or non-steroidal anti-inflammatory (NSAID) medications; OR
2. Active peptic ulcer disease, recent gastrointestinal bleeding or perforation, or history of peptic ulcer disease or gastrointestinal bleeding; OR
3. Expected need for continuous neuromuscular blockade for more than 24 hours following intubation; OR
4. Requirement for tight temperature control (defined as the requirement for continuous administration of antipyretic medications to prevent secondary injuries associated with fever); OR
5. Platelet count \< 100,000/microliter; OR
6. Known liver disease (defined as pre-existing diagnosis of hepatic insufficiency, or a serum ALT \> 5 times upper limit of normal or serum total bilirubin \> 2 times the upper limit of normal, as defined by hospital laboratory standards); OR
7. Known kidney disease (defined as pre-existing diagnosis of renal insufficiency, or an estimated creatinine clearance \< 30 mL/min/m2 obtained within the previous 24-hours prior to eligibility, or high risk of renal failure due to volume depletion); OR
8. Current treatment with extracorporeal therapies (e.g., ECMO, CVVH, plasma exchange); OR
9. Cardiac bypass surgery within the past 24 hours prior to eligibility; OR
10. Requirement for the patient to receive lithium, pentoxifylline or probenecid as part of their routine care; OR
11. Unable to obtain consent and randomize within 12 hours of eligibility, OR
12. Positive pregnancy test; OR
13. Coma, Vegetative State, or Brain Death (Pediatric Cerebral Performance Category (PCPC) score of 5 or 6) suspected or confirmed; OR
14. Cardiac arrest has occurred within 72 hours of eligibility criteria being met; OR
15. Limitations in care in place at the time of eligibility, or anticipated to be considered during the 5-day study period, OR
16. Use of high dose NSAIDS within the prior 6 months, OR
17. Suspected or confirmed cerebrovascular bleeding or hemorrhagic diathesis