One Dose of Benzathine Penicillin Noninferior for Early Syphilis
Conexiant
September 5, 2025
A single dose of benzathine penicillin G was found noninferior to three doses for early syphilis at 6 months in a randomized clinical trial.
Serologic response rates were 76% for the one-dose group and 70% for the three-dose group, with no clinical relapses observed during follow-up.
The trial enrolled 249 patients, predominantly men (97%), with 62% identifying as Black and 61% living with HIV.
Injection-site pain was reported by 76% of the one-dose group and 85% of the three-dose group, with local tenderness affecting 81% overall.
The study faced limitations, including early enrollment cessation due to COVID-19 and discrepancies between overall results and stage-specific analyses.
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