How do you cure syphilis?

Peniccilin. Good old fashioned penicillin is still the standard first line treatment for syphilis. For people with an allergy to penicillin there are other antibiotics available. Syphilis is a treatable std. Get tested.
Penicillin shot. If caught early, syphilis may be cured with antibiotics. A single dose of penicillin injected into the muscle is extremely effective in treating the early stages of syphilis.