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Easybenzathine penicillin G 2.4 million units IM single dose is recommended. Oral penicillin V (B) is ineffective. Doxycycline (C) is an alternative only in nonpregnant penicillin‑allergic patients for 14 days. Single‑dose ceftriaxone or azithromycin (DPrimary Syphilis"infectious diseases"

A 31-year-old has primary syphilis (painless chancre, positive RPR). No penicillin allergy. Preferred therapy is:

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