IV acetaminophen had similar analgesic outcomes as
the active comparator. Twelve of the 14 placebo studies
found that IV acetaminophen patients had improved analgesia.
Ten of those 14 studies reported less opioid consumption,
1. the IV acetaminophen dosing regimen varied
among studies (eg, a single 1-g dose given either
before surgery or during surgery, 1 g administered
every 6 hours for 24 hours, or 1 g given
once a day every day for 7 days).