One of my rescues had an unknown URI when I took a group of four in and I took her to the vet along with another stray kitten that started sneezing. The vet prescribed amoxicillian. Of course it spread to my permenant kitties. After treating five cats with the antibiotics, most recovered to just sneezies. I had two kittens quarantined to my bathroom at the time. They were born in the wild from a stray cat dropped where my mother lived and I had been working to tame them as they were feral. The boy had a runny eye which was cleared up with terramycin when I got him. They caught the URI last after I had put the other cats through the amoxicillan. The boy's eyes started weeping so I took him and his sister to the vet to get more amoxicillian. The vet prescribed gentamicin sulfate for his eyes. I've been giving them their meds religiously per instructions. However, little boy's eyes have seemed to get way worse! One is very swollen and he sits with his head tilted back. His eyes are shut at all times and leaking clear fluids. I read online that gentamicin sulfate can cause swelling in the eyes and was wondering if anyone else had any experience with this? I will definitely give the vet a call in the morning, but was looking for any additional information that might be helpful. I don't want this boy to go blind. Thanks!