a single-dose , double-blind , randomized clinical trial was conducted to examine the relative analgesic efficacy of ibuprofen 400 mg ( n = 36 ) , acetaminophen 1000 mg ( n = 37 ) , and placebo ( n = 38 ) in postpartum patients who had moderate to severe pain after episiotomy .
C0000970
acetaminophen
C0030193
pain