Hello,
I would ask your vet about the following;
Giving sq fluids at home daily, adding a short course of a steroid and the latest opinion on prazosin’s efficacy. (I don’t use it).
Also I don’t use vinegar.
These are a matter of experience and preference. Therefore please ask your vet or find a feline only practitioner to help.
Hello
Have you asked for a second opinion from another veterinarian? Try to find a local independently owned veterinary practice that comes recommended by people in your area. Reach out to local rescues and shelters and use social media to try to find someone.
I don’t know enough about your cat to offer more specific information.
I hope this helps and I wish you the best.