Efficacy of oral antibiotics to treat secondary syphilis

The lesions of Secondary syphilis are usually red and scaly, typically found on the chest and the palms of the hands.As the lesions age they can become less scaly and more polymorphic becoming more papular and sometimes pustular and pigmented.They usually begin 6 to 8 weeks after the penile ulcer or chancre and can last days or months. Treatment of choice remains single dose of benzathine penicillin 2.4 mega units given intramuscularly. Which oral antibiotic have been found equally effective in case of penecillin hypersensitivity? View images