This makes the third fancy antibiotic my senior cat has been put on with no lasting results. One was an injection (costing about $100 plus office visit and exam), and the other two oral solutions - at my request - that I'd never heard of costing around $50 a bottle. The infection with congestion, sneezing, discharge, hard boogers (dried pus), and malaise has returned each time - this last time, within a week. Obviously, I'm frustrated! This has to be VERY uncomfortable for him, and it's very expensive for me. Suggestions?