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My cat's fur loss worsened after antibiotics. Is it a reaction?

Updated On September 23rd, 2025

Pet's info: Cat | Mixed Breed | Male | neutered | 1 year and 2 months old | 8.4 lbs

I took my cat to the vet last week bacaise of a patch of missing fur and some redness on his leg. He was given antibiotics and wipes. Now , the patch of missing fur seems to have gotten bigger and another spot has appeared. He’s scratching his head more and licking that leg as well. Could this be a reaction to the medicine he was given ? Should we be worried?

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1 Answer

Most Helpful Answer

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Answered By Daniel Fonza, DVM

Veterinarian

Published on October 12th, 2018

Hi there and thank you for using Petco Pet Education Center, formerly Petcoach to address your concern. The antibiotic injection did not likely worsen the area. The wipes may be further irritating the area so I would discontinue the wipes and consider trying a topical spray such as Malacetic Conditioning spray (can be found online) and apply twice daily until resolved. This may also be a fungal infection such as ringworm so using the spray will help treat the potential fungal infection. If the area does not improve or it worsens, I would bring Marlow back in for a recheck examination with the previous veterinarian so that the most appropriate diagnostic and treatment recommendations can be made. I hope this helps! Please let me know if you have any other questions or concerns and I would be more than happy to help you further.

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