So me and the old lady came down with bronchitis. She went to urgent care and was given an antibiotic called azithromycin. I didn't go to try an experiment. I am pleased to tell you guys that fish antibiotics work. I bought a bottle of Fish Mox. It's just plain Ciprofloxacin. The same thing you get at the pharmacy. I'm still alive after day 3 on it and the bronchitis is going away. Thomas Labs Fish Flox Forte Ciprofloxacin Antibacterial Fish Medication, 500 mg, 30 count - Chewy.com Read the reviews. Apparently I'm not the only one using it. Here's one review. Expensive, but worth it. Manufactured in USA, makes it more trustworthy. My "fish" had an infection in his throat. He was given this med for 15 days 2x a day. He is all better. His sore throat is gone. I did this experiment to see if they really work like the preppers say that they do so I can stock up for the inevitable collapse. It's American made pure antibiotics. Just not FDA approved.