Antibiotic Dosage Guidelines

Pediatric and Adult Dosage

The American Heart Association recommends a cefazolin dosage of 100 mg/kg/day divided every 8 hours for pediatric patients, with a maximum of 12 g daily, and for adults, standard dosing is typically 1-2 g every 8 hours depending on infection severity and weight 1
For children over 1 month, the recommended dosage is 100 mg/kg/day IV divided every 8 hours, as supported by the American Heart Association and the Infectious Diseases Society of America (IDSA) which recommends 75-100 mg/kg/day 1, 2
The maximum daily dose of cefazolin is 12 g daily, applicable to both pediatric and adult patients 1

For endocarditis treatment and prophylaxis, cefazolin is dosed at 100 mg/kg/day divided every 8 hours for children, with a maximum of 12 g daily, as recommended by the American Heart Association 1, 3
For surgical prophylaxis, a single dose of 100 mg/kg (maximum 2g) is appropriate, as per guidelines that may be considered by medical professionals 4
For treatment of established infections, the full therapeutic dose should be used, for example, for a 70kg patient, the dose would be 7 grams/day, divided into 3 doses (every 8 hours): 2.3 grams per dose 2

Renal function should be monitored as cefazolin is primarily eliminated through the kidneys, and dose adjustment is necessary if renal dysfunction is present to prevent neurotoxicity 2
Intravenous administration should be given slowly to prevent adverse reactions, with the rate of administration to be determined by medical professionals 1
For prolonged therapy (>48 hours), monitor for superinfection and consider probiotic supplementation, as recommended by relevant medical guidelines 4