Dr. Guan believes that doxycycline can effectively block the spread of syphilis. Doxycycline is an antibiotic, which can effectively kill Treponema pallidum, thus reducing the risk of infection.

Doxycycline should be used under the guidance of a doctor because long-term use of antibiotics may have some side effects. The best way to prevent syphilis is to avoid unclean sex and pay attention to personal hygiene.