Penicillin is able to treat syphilis and needs to be replaced with another medication if you are allergic to penicillin.
Penicillins are the drugs of choice for the treatment of syphilis. For example, benzylpenicillin is used for stage I, II or latent syphilis, benzylpenicillin or procaine penicillin is used for advanced syphilis or recurrent syphilis, and aqueous penicillin is often used for neurosyphilis or ophthalmic syphilis.
It should be noted that some people are allergic to penicillin, and it is not recommended to use penicillin. Doxycycline, tetracycline hydrochloride and other drugs can be used for treatment.
The prognosis of syphilis is generally better if it is treated early, and it is recommended that patients actively cooperate with doctors for treatment and pay attention to personal hygiene and isolation measures.