RCTs WITH AN ACTIVE COMPARATOR
Overall, in 7 of the 8 studies with an active comparator arm (IV parecoxib [n = 3 studies], IV metamizol [n = 4], oral ibuprofen [n = 1]), IV acetaminophen was found to have similar analgesic outcomes as the active comparator. Three of these 8 studies also reported that IV acetaminophen patients had a significant reduction in mean opioid consumption, a lower percentage of patients rescuing (defined as the fraction needing any rescue), or a longer time to first rescue with IV acetaminophen compared with the active comparator patients.