Michael P Broderick1, Christian J Hansen, Dennis J Faix. 1. Henry M. Jackson Foundation at The Operational Infectious Diseases Department, Naval Health Research Center, San Diego, CA 92106, USA. michael.broderick@med.navy.mil
Abstract
BACKGROUND: An interval of 3-4 weeks between intramuscular injections of 1.2 million units of benzathine penicillin G as prophylaxis against group A streptococcal infection is recommended by health organizations for patients with pediatric rheumatic fever and heart disease. METHODS: We reviewed the literature for evidence of the persistence of serum penicillin G during the first 4 weeks after the recommended dose of benzathine penicillin G. RESULTS: The weighted-mean concentration was <0.02 µg/mL by 3 weeks after the initial dose. Weighted means were lower in studies done after 1990 than before (P<0.01), in studies dealing with secondary versus primary prophylaxis (P<0.01) and in studies in children versus those in adults (P<0.02). CONCLUSIONS: Recommendations for benzathine penicillin G prophylaxis may need reevaluation.
BACKGROUND: An interval of 3-4 weeks between intramuscular injections of 1.2 million units of benzathine penicillin G as prophylaxis against group A streptococcal infection is recommended by health organizations for patients with pediatric rheumatic fever and heart disease. METHODS: We reviewed the literature for evidence of the persistence of serum penicillin G during the first 4 weeks after the recommended dose of benzathine penicillin G. RESULTS: The weighted-mean concentration was <0.02 µg/mL by 3 weeks after the initial dose. Weighted means were lower in studies done after 1990 than before (P<0.01), in studies dealing with secondary versus primary prophylaxis (P<0.01) and in studies in children versus those in adults (P<0.02). CONCLUSIONS: Recommendations for benzathine penicillin G prophylaxis may need reevaluation.
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