Units: mcg/dL / umol/L Newborn: 100-250 / 17.9-44.8 Infant: 40-100 / 7.2-17.9 Child: 50-120 / 9.0-21.5 Intoxicated child: 280-2550 / 50.1-456.5 Fatally poisoned child: 1800 / 322.2 Adult M: 65-175 / 11.6-31.3 Adult F: 50-170 / 9.0-30.4