IV Adult & childn 15,000-25,000 u/kg/day every 12 hr.
Infant Up to 40,000 u/kg/day.
Kidney impairment Reduce from 15,000 u/kg downward every 12 hr. Total daily dose: Not >25,000 u/kg/day.
IM Adult & childn 25,000-30,000 u/kg/day divided at 4-6 hr intervals.
Infant Up to 40,000 u/kg/day.
Intrathecal Adult & childn >2 yr 50,000 u once daily for 3-4 days then 50,000 u once every other day for at least 2 wk after cultures of CSF are -ve & sugar content returned to normal.
Childn <2 yr 20,000 u once daily for 3-4 days or 25,000 u once every other day. Continue 25,000 u once every other day for at least 2 wk after cultures of CSF are -ve & sugar content returned to normal.