I would not switch medication until you get some input from some the experts on this forum,i respect the advice of Casportpony,Dawg53,Realisis,Haunted55 and Eggcessive,PM anyone of them and see what they suggest. I have not had any serious illness,so i cannot advise on what other medication to try,i am only familiar with Baytril,Tylan and Tetracycline.I didnt see this post until just now. I havent ordered anything yet because I didnt know what I should go for. So buy what you suggested in your first post?