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My hyperthyroid cat's BP meds cause side effects. Can I stop them?

Updated On September 23rd, 2025

Pet's info: Cat | Mixed Breed | Female | spayed | 18 years and 2 months old

My 18 year old cat has hyperthyroid.She was being treated with the liquid and doing well on it, gained lots of weight ect Unfortunately she then got very high blood pressure and her retinas detached.our vet prescribed bp medication and she can see again but it seems to be interfering with the other meds, she has lost lots of weight and having severe itching that she wasn't getting before-as high bp was caused by thyroid problem would it be ok to stop bp meds now its come down a lot and just trea

1 Answer

Most Helpful Answer

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Answered By Stacey Anstaett, DVM

Veterinarian

Published on July 10th, 2018

Do not stop the blood pressure medication without first talking to the vet who is treating Tinker. It sounds like it may be helpful to run some lab work on her to see how well controlled her hyperthyroidism is, and see if that medication needs adjusted. If an adjustment in her dose of hyperthyroidism med is needed, then it MAY be ok to stop the blood pressure mediation once she's on a different dose, BUT DO NOT DO THIS without first talking to the vet who is managing her case. The other concern and possibility here is that there may be a separate issue going on such as cancer. The older they get the more likely we are to see multiple problems arise. Good luck with her! Thanks for asking Petco Pet Education Center, formerly Petcoach!

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