RESULTS
Sixteen full-length articles from 9 countries published
between 2005 and 2010 met our inclusion criteria and
were fully analyzed (Table 1).
Overall, there were 1,464 patients included in the 16
RCTs including a total of 780 patients who received IV
acetaminophen. The median sample size including
control groups equaled 54 patients (average 68, range
25 to 165), with median follow-up of 1 day (average
1.54 days, range 1 hour to 7 days).
Four of the 16 articles had 3 arms in the study: a
placebo group, an IV acetaminophen group, and an
active comparator or a second IV acetaminophen group
with different timing of dosing. One article had 4 arms,