Wobbliness (ataxia) after Eprinomectin in dogs

30 reports to the FDA describe wobbliness (ataxia) in dogs given Eprinomectin. That is 29% of all reports for this medicine, compared with 2.6% across reports for all dog medicines, so it is reported unusually often with this medicine.

30Reports
23%Marked serious
3.3%Recovered
10%Died or euthanised
–Typical onset
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How the animals did

Recovered
1 3.3%
Died
3 10%
Not known
26 87%

Problems reported at the same time

Drooling
6 20%
Lethargy
5 17%
Death
3 10%
Loss of appetite
3 10%
Disorientation
2 6.7%

Age of the animals

Under 1 year
7
1–3 years
11
4–7 years
3
8–11 years
1
12+ years
1

About this medicine

Eprinomectin controls worms and prevents heartworm.

Some herding breeds (for example Collies) carry the MDR1 gene variant and can be more sensitive to this drug class at high doses.

Questions owners ask

Can Eprinomectin cause wobbliness (ataxia) in dogs?
30 reports link the two, but a report alone does not prove the medicine was the cause: other illnesses, other medicines or coincidence can be involved. Your vet can judge it for your animal.
What should I do?
Don't give another dose until you've spoken to your vet, and keep the packaging so you can tell them the product and dose. Your vet can also report it to the FDA (or you can, through the manufacturer or FDA form 1932a).

Wobbliness (ataxia) with similar medicines

All reported side effects of Eprinomectin in dogs · Medicines most reported with wobbliness (ataxia)