Hello, I have an 8 year old female cat named Palmer who has struggled with cystitis flare ups which usually occur once or twice a year. I am pretty familar with the basics of this condition including lots of water, feeding wet food, regular litter box cleaning and stress reduction but this past week she is having a flare up that I can't seem to get under control. A few days before she starting going frequent small amounts for some reason she held her urine for over 28 hours so I immediately took her to the vet. The took a urine sample, did blood work and gave her a 2mg shot of Dexamethasone. Dose anyone know if this shot should have started working by now, it has been four days, she is still going tiny amounts and not making it to her littler box on time. I had to see a different vet this time and he said he said he doesn't like giving antibiotics if there is no infection so he went with the Dexamethasone. The last time she had a flare up she was given a covenia shot and got better in one day, is it possible that the antibiotic could work that fast? Should I take her back for a different opinion or wait a few days? I don't know If this has anything to do with her flare up but I noticed that she is coughing up hair balls two nights in a row now which is rare for her, could a blocked hair ball be causing her problems. Any advice would be appreciated. Thank you!