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My dog with CHF is breathing hard. Can Mucinex or steroids help?

Updated On September 23rd, 2025

Pet's info: Dog | Japanese Chin | Female | unspayed | 14 years and 7 months old | 12 lbs

My 14y/o fur baby has confirmed CHF. She's on lasix and prednisolone; however, lately is having a harder time breathing than usual and wheezes and coughs alot. My vet has already said current weather conditions make her worse etc. So my question is just until I can get her seen again, would Mucinex DM or an extra dose of steroid help her breath easier?

1 Answer

Most Helpful Answer

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Answered By Ricardo Fernandez, DVM

Veterinarian, Veterinary Oncology Resident

Published on August 25th, 2018

Thanks for using Petco Pet Education Center, formerly Petcoach! I would check in with your veterinarian at this time as coughing and wheezing are not expected to be due to the weather and there are certainly other diuretics and medications that can be added for heart disease which may help. I am concerned that her heart failure has worsened and should be evaluated by a veterinarian soon. Also, check in with your veterinarian about the use of prednisone as that can make heart failure worse. Mucinex would not help as that is used for a different purpose such as releasing mucus which is not what is causing the cough in a heart failure patient. Good luck and have a great day!

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