Can I take doxycycline after implant surgery?

Just had reconstructive breast surgery (First operation had major problems due to scar tissue.) That said, because of radiation and a first time fail, I asked my PS about anti-biotics. She does not want to prescribe. I'm quite concerned about infection and failure, so I scrounged around the house to see if I had any---and I do---a full course of doxycycline. Can I take this? I've never had a problem with doxy before.