Adult 125-500 mg every 6-8 hr. Max: 7.2 g daily. Continuous prophylaxis of strep infections in patient w/ history of rheumatic heart disease &/or chorea 125-250 mg every 12 hr. Infant & childn up to 12 yr 2.5-9.3 mg/kg every 4 hr or 3.75-14 mg/kg every 6 hr or 5-18.7 mg/kg every 8 hr.
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