minocycline, doxicycline, azythromYcine and tetracycline I discovered are less aggressive on the gut flora.I take 2x/day a probiotic.
There is a study on the anti-inflammatory effects of minocycline, in which it is stated that it is anti-inflammatory even on the gut, this is why it is used in some forms of colitis.Also the article states it has mild anti yeast effects.(of course I can not give you a link
Usually as summer 16 stated cefalosporins, clindamycin, fluoquinolones even amoxi is harder on the gut, regarding damaging gut flora and creating yeast problems.When I have to use those I usually take saccharomyces b., as nothing else helps with the loose stools.Also GF,SF,DF diet is a must as all 3, enhance yeast development.
And good luck with beginning Abx., let the herx be mild.