The comparator group Ofirmev® is intravenous acetaminophen and was recently approved by the FDA for the management of mild to moderate pain, the management of moderate to severe pain with adjunctive opioid analgesics, and the reduction of fever. In a study conducted for total abdominal hysterectomy, preemptive IV paracetamol (acetaminophen) 1 g provided good quality postoperative analgesia, with decreased consumption of morphine and minimal side effects. Studies have showed that the use of 1 g of paracetamol as a single intravenous preemptive dose in abdominal surgery with perioperative epidural analgesia did not reduce the analgesic consumption and the intensity of pain in the postoperative period.