My 9 yr old mixed breed hound got sick the day after Thanksgiving, he was throwing up & could not eat or used the bathroom, then the following morning he still would not eat or have a bowel movement just alot of dark red blood in his urine , so we took him to the vet, the vet did only an x-ray & said he had a very bad bladder infection , he gave us an anti biotic & the pill i was asking about in my question, then he died today ... just wanted to know what this pill is used for exactly???