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Dr. M.
Dr. M., Board Certified Equine Surgeon
Category: Horse Veterinary
Satisfied Customers: 1572
Experience:  Board certified surgeon, lameness and advanced imaging expert. 9 years experience.
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My 12 yo clyde/tb mare has had rapid shallow breathing for

Resolved Question:

My 12 yo clyde/tb mare has had rapid shallow breathing for 3 days. No fever, acting normally, eating and drinking well, normal urination and bowel movements. Evaluated by my local vet and had normal cardiac exam, no evidence of wheezing at rest or with provocation. No improvement with dexamethasone times 4 doses. Any thoughts?
Submitted: 6 years ago.
Category: Horse Veterinary
Expert:  Dr. M. replied 6 years ago.

Dr M :

how much dex?

Dr M :

any fever?


no fever. tmax 101. usually 100.3 taking 12 mg dex...1st dose iv, subsequent doses po

Dr M : Would increase the dose to 20 mg orally once a day for 3 more days.
Dr M : In absence of fever, allergies is the only explanation.
Dr M : Having your vet perform a bal (broncho-alveolar lavage) to characterize further the type of inflammation/ allergy in lungs

she was receiving 12 mg orally bid for last 2 days

Dr M : Yes, the pharmacokinetics of dexanetyazone makes it more efficient at a higher dose only once a day.
Dr M : Starting on a bronchodilator as well will be helpful (ventipulmin)

how soon should an improvement be seen with dex? she is no better after 2 days.


How likely is it that this in heaves vs. one-time allergic reaction?

Dr M : With as bad as it started it is likely a first issue/ single allergy.
Dr M : Give it 3 more days

thank you

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