Children 2 to 12 years of age: 15 mg/kg every 6 hours or 12.5 mg/kg every 4 hours to a maximum of 75 mg/kg per day.15 mg/kg every 6 hours or 12.5 mg/kg every 4 hours to a maximum of 75 mg/kg per day.( 2.2)Īdults and Adolescents Weighing Under 50 kg: 1000 mg every 6 hours or 650 mg every 4 hours to a maximum of 4000 mg per day.( 2.4)Īdults and Adolescents Weighing 50 kg and Over: ACETAMINOPHEN injection for intravenous use should be administered only as a 15-minute intravenous infusion.ACETAMINOPHEN injection for intravenous use may be given as a single or repeated dose.