I am very frustrated: my 16 year old cat has had two bouts of red blood dripping from her urinary tract with urgency to go and moaning. I had left over Clavamox antibiotic on hand but am running out. This started with her BUN elevating to 62 so her vet started me giving her subQ fluids. The BUN improved to 57. Three weeks after the BUN elevating my kitty had her first boat of blood dripping from her urinary tract with urgency to go and moaning. I had left over Clavamox antibiotic from years prior still with a good expiration date but the vet on call warned to wait until my vet was in (shared practice) but after waiting all day with blood drips and a moaning cat running to the litter box he agreed that I should go ahead with the antibiotic. Within an hour of taking the antibiotic Clavamox the bleeding stopped and by morning the discomfort and urgency to go stopped. That morning she saw her regular internal medicine vet who took blood and found her creatinine that had been 2.7 and BUN that was 62 were improved. The BUN dropped to 57 and creatinine dropped to 2.1. This was while she was started on the antibiotic. Urinalysis showed nothing. After two weeks on antibiotics she went off them. Seven days off antibiotics a urine culture was done and nothing showed. Urinalysis was ok. However her creatinine had jumped to 3.2 higher than ever before. The BUN remained the same at 57. SDMA was in normal range. Nine days off antibiotic (two days after the that last vet visit) the dripping red blood and urgency to go started again. This time I still had eight days of antibiotics left over and right away I started her on them again. Within an hour on antibiotics the blood dripping stopped. By morning the discomfort and urgency to go stopped. My internal medicine vet did not want her to continue antibiotics because her urine culture had been normal two days prior. She thought it was just Inflammatory and not bacterial and would resolve on its own. Her regular vet a cat vet that she sometimes sees said they always wait ten days off antibiotics before urine culture for kitties. Her culture was done at only seven days off antibiotics and that may have been too soon to show bacteria. She has no symptoms while on antibiotics. Symptoms came back nine days off antibiotics. I think my kitty is not over an infection and may need to be on antibiotics longer. I am in disagreement with her internal medicine vet who has seen her for 15 years who says it is only inflammatory. But she had bright red blood dripping! I have appointments with her cat vet and a different internal medicine vet over the next couple weeks but I will run out of Clavamox in a couple days - a week before her first available appointment. She has had ultrasound a month or two ago and nothing new showed. She has pancreatitis, pancreatic hyperplasia and inflammatory bowel disease and a little inflammatory liver. (Triadic cat) The pancreatitis had been recently uncontrolled. She recently had her steroid Budesonide increased to .6mg from .4 mg for her IBD and pancreatitis. She had 7 bad teeth pulled by a vet dentist around a couple months ago and was given a shot antibiotic. Nine months ago she had a thyroid adenoma treated with I131 and her thyroid is now normal. In 2016 she had a rare benign liver tumor that bled and was surgically removed. Her internal medicine vet has now finally given me an additional 7 days of Clavamox antibiotic but they are flavored chewable and I'm not sure if the flavor will trigger more inflammatory bowel disease allergic reactions. I have not been able to find the regular Clavamox tablets she takes anywhere. The manufacturer will only talk to a veterinarian. Not helpful. I am frustrated with her internal medicine vet who I always liked before and am very worried. I do not want her kidneys damaged. I think she may need to be on antibiotics for a much longer time. I don't like her going on and off antibiotic as it could cause a resistive strain. Advise needed.