Can You Tell Who is Going to Have an Adverse Event to The FQ’s?

No.  And that is what makes these drugs so insidious.  There is still not enough known about ‘how’ the Fluoroquinolones damage the human body to develop a test to determine who will have an adverse event. There are some strong suggestions that some genes may play a role in an adverse event such as certain CYP polymorphisms which effect drug metabolism, but so far none have proven universal enough to developing an accurate test.

Having said that, I have made some loose correlations from data over the years linking certain groups of individuals to a higher prevalence of an adverse event from Fluoroquinolones.  You can view this data here.  Please note that these lists are not all inclusive.