This terrible condition called chronic rhinitis plagues my cat, which is most likely the result of feline herpes. What drugs are best for helping to combat nasal drip and congestion caused by chronic rhinitis that is caused by a) turbinate destruction b) aural polyp c) early stage nasal carcinoma? Nasal swab tests are negative for usual viruses and fungii.
bacterial cultures were also taken and probably were negative also if he was on antibiotics at the time. However, if aerobic and anaerobic bacterial cultures have not been performed, they should be.
(3) Aural polyps can occur secondary to chronic ear infections or chronic ear mites or the polyps can cause secondary infection, etc. Is your kitty strong enough and healthy enough otherwise to undergo surgical removal of the polyp? I only mention this because it sounds like the polyp is causing the most problem at the moment.
(4) I don't know if several different antibiotics have been used or the same one repeatedly. I have the most success with Clavamox, but if that has been used frequently, then trying to identify an appropriate one with a culture would be my first choice. If that is not productive, I like a Clavamox/Baytril combination or CefaTabs (or CefaDrops).
(5) Cyproheptadine is very appropriate for the situation and is the best thing for appetite stimulation.
(6) Steroids (prednisolone) has to be used cautiously, but I would most likely be prescribing that. There is so much inflammation associated with both the polyp and rhinitis. Prednisolone would help that as well as stimulate appetite and also slow the growth possibly of the mass.
However, I would definitely cover the immunosuppressive effects of the prednisolone with antibiotics.
(7) Is the squamous cell carcinoma unable to be excised completely? If there was any chance of that and he is ok for anesthesia, that could be considered and removal of the polyp at the same time.
(8) Humidifiers are also helpful.
Again, I cannot say these are absolutely the things to do for your kitty because I don't have first-hand knowledge of his physical condition. I hope though that I have given you some ideas to discuss with your veterinarian.
Good luck, Steve. My best wishes are with you and your cat. Feel free to write back any time.