Congenital syphilis Early congenital syphilis penicillin 0.1~0.15 million U/kg d IM for 10~15 days Late congenital syphilis penicillin 0.2~0.3 million U/kg d IM for 10~15 daysCongenital syphilis • Early congenital syphilis - penicillin 0.1~0.15 million U/kg d IM for 10~15 days • Late congenital syphilis - penicillin 0.2~0.3 million U/kg d IM for 10~15 days