A member asked:

I understand syphilis is unlikely from getting oral sex from a female. the day after,i was given a shot of rocephin and put on doxycycline 100mg twice a day for7 days as a precaution will this dose of doxy kill syphilis as well or is7 days too short?

2 doctors weighed in across 2 answers
Dr. Hunter Handsfield answered

Specializes in Infectious Disease

The doxycycline doesn't matter. The standard ceftriazone (Rocephin) dose always prevents syphilis when given soon after exposure. You are 100% protected against gonorrhea, syphilis, and chlamydia. (Not that you needed such treatment after a single oral sex exposure!) That's my last comment to your third (?) question about this event. No more, please.

Answered 10/4/2022

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This is prophylactic- or 'just in case, and should be OK

Answered 10/5/2022

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