I have apparently become resistant to rifampin, due to starting and stopping it several times over the last 14 months. I understand this is a common occurrence concerning this particular drug, even though it was always coupled with at least one other anti-biotic. That being said, does this automatically predispose me to also being resistant to rifabutin, which I have yet to begin? I need this particular class of drugs to help eradicate a very aggressive and stubborn case of bartonella, and the only other drug which would compare in effectiveness would be levaquin, which I have consciously opted to no longer take, due to its many detrimental and dangerous adverse effects.