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Dog eye ulcer not healing with Vetropolycin? Switched to Terramycin.

Updated on September 23, 2025

Pet's info: Dog | Mixed Breed Large (61lb +) | Female | spayed | 4 years and 9 months old | 85 lbs

My dog was diagnosed with a superficial eye ulcer on 9/14 (took her to ER immediately when I noticed something wrong). She was given 10 day's Tx with Vetropolycin. Took her to regular vet yesterday for a re-check and it's still there! She said it's tiny now, but Tx must continue until gone. They put her on Terramycin instead. What is the difference in these medications and what are the chances it will heal with this Tx? I read these things should heal on their own in 3-5 days...worried.

1 Answer

Most Helpful Answer

Linda G,  MS, DVM

Answered By Linda G, MS, DVM

Veterinarian

Published on September 24, 2019

Hello. When an infection or lesion has been treated for a time & it has not totally cleared up, it is always a good idea to switch to another medication. Vetropolycin is a triple antibiotic containing Bacitracin, Polymyxin & Neomycin & is generally prescribed for conjunctivitis. Terramycin contains oxytetracycline which is a bit more broad spectrum & is indicated in treating not only conjunctivitis, but other ocular conditions including corneal ulcers. Some ulcers do indeed heal very quickly, but sometimes we do run into a stubborn one. As long as the ulcer seems to be resolving, continue the medication & do make sure you have your veterinarian recheck the eye in about a week. Thanks for using Petco Pet Education Center, formerly Petcoach.
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