Could hydrogen sulfide (H2S) be driving some of your chronic floxing symptoms? Evidently it is in a subset of individuals who are chronically floxed.
One culprit that is often overlooked in chronic Fluoroquinolone toxicity is small intestinal bacterial overgrowth, or SIBO.
I suffer from gastritis post Fluoroquinolones (FQ). I have found one of the hardest places to help is the upper part of the stomach and or the lower esophagus. Enter slippery elm.
Probiotics can be powerful substances that can exert a strong influence on the host person and like everything carry a small but measurable risk.