Vocalising after Ormetoprim + Sulfadimethoxine in dogs

The FDA has received 20 reports of vocalising in dogs after Ormetoprim + Sulfadimethoxine. That is 2.3% of all reports for this medicine, compared with 1.2% across reports for all dog medicines, so it is reported unusually often with this medicine.

20Reports
5.0%Marked serious
5.0%Recovered
5.0%Died or euthanised
–Typical onset
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How the animals did

Recovered
1 5.0%
Still unwell when reported
2 10%
Died
1 5.0%
Not known
16 80%

Problems reported at the same time

3 15%
Hyperaesthesia
2 10%
Hind limb paresis
2 10%

Age of the animals

Under 1 year
4
1–3 years
6
4–7 years
5
8–11 years
5
12+ years
0

About this medicine

Type: medicine.

Questions owners ask

Can Ormetoprim + Sulfadimethoxine cause vocalising in dogs?
20 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).

Vocalising with similar medicines

All reported side effects of Ormetoprim + Sulfadimethoxine in dogs · Medicines most reported with vocalising