1 Department of Pediatrics, New York University College of Medicine, and the Children's Medical Service, Bellevue Hospital Center
Four types of penicillin for intramuscular injection were compared for incidence of local reaction: (1) suspension of benzathine penicillin G, 600,000 units in 1 ml; (2) benzathine penicillin G, 600,000 units, with 5 mg of prednisolone, in 1 ml; (3) benzathine penicillin G, 600,000 units, plus aqueous procaine penicillin, 600,000 units, in 2 ml; and (4) aqueous procaine penicillin, 1,200,000 units in 2 ml.
A total of 320 children were evaluated at 24 hours, and the following percentages of severe local reaction were recorded for the four penicillin preparations listed: (1) 54%; (2) 9%; (3) 11.5%; and (4) 4%. The incidence of mild local reactions was the same following all four preparations, 11 to 12%.
The local tolerance to benzathine penicillin G, 600,000 units, was significantly improved by combining it with either 5 mg of prednisolone, or an equal dose and volume of aqueous procaine penicillin.
Submitted on July 22, 1957
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