I've been culturing Staph Aureus since the 1980s. I've been on dozens of oral abx. Once I did the IV abx and for that I took Cefepime and Tobramycin. You need to look at your cultures and see what variety of staph you're culturing and what kind of abx it's susceptible to. Your doctors should be doing that, but just incase you can ask for copies of your culture results and see for yourself. There are several different classes of abx all of which work differently. To name some of the ones I've had for S.Aureus: Bactrim, amoxicillin, penacillin, azithromycin, levaquin, amantadine (that was back in the 80s not sure they make it now, but it was a serious hallucinogenic abx!). ~Juliet