What Does SDMA Mean in Dogs and Cats?
Quick answer
SDMA is a molecule the kidneys filter, and it can rise earlier than creatinine when kidney function starts to decline. Because it is less affected by muscle mass, it helps in thin or senior pets. A single high SDMA is a prompt to recheck and look at urine tests, not a diagnosis on its own.
What is SDMA?
Symmetric dimethylarginine is released by cells throughout the body and removed almost entirely by the kidneys.
Reference range
[Range pending sourced table] Reference ranges vary by lab and species. Use the range printed on your pet's report.
What can raise SDMA
- Reduced kidney filtration
- Dehydration
- Some other illnesses
What can lower SDMA
- Low values are not considered significant
Dogs vs cats
In dogs
In dogs, SDMA can flag early changes before creatinine moves.
In cats
SDMA is especially useful in thin older cats whose creatinine may look falsely reassuring.
Why one value rarely tells the whole story
SDMA is sensitive but can be affected by hydration and other conditions, so trends matter most. Hydration, recent meals, stress during the visit, medications, and how the sample was handled can all shift a result. Vets look at the whole panel, your pet's symptoms, and the trend across tests over time.
Conventional interpretation
Vets use SDMA with creatinine and urine tests in kidney staging.
Whole-pet context
Encourage hydration and track appetite, weight, and thirst.
Supportive options are not a cure. Check with your veterinarian before adding any supplement.
Questions to ask your vet
- Should we recheck SDMA?
- What does the urinalysis show?
- Does this change our monitoring plan?
- How does this compare with my pet's previous results?
Frequently asked questions
Is SDMA better than creatinine?
- It can detect changes earlier, but vets use both together.
What if only SDMA is high?
- Vets usually recheck and review urine tests before drawing conclusions.
What is a normal SDMA range?
- Reference ranges vary by laboratory, analyzer, and species. Use the range printed on your pet's report and ask your vet how your pet's result compares.
Should SDMA be rechecked?
- Your veterinarian decides based on how far from range the value is, your pet's symptoms, and other results. Trends over time are often more useful than one result.
Related lab values
Related guides
Educational support only. Not a diagnosis or substitute for veterinary care.
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