I don't know what you are infected with, that's why we can't answer.
If you are talking about gonorrhea or chlamydia, you need to wait 7 days from the time of treatment before any kind of sex at all, so that would be 7 days from the time your bf took his pills.
You should talk to your doc because you might be re-infected orally now, and might need to be retreated.
AJ
Your question does not make any sense. It is does not have enough information for a response.