Swelling after Amitraz in dogs

The FDA has received 47 reports of swelling in dogs after Amitraz. That is 6.3% of all reports for this medicine, compared with 2.8% across reports for all dog medicines, so it is reported unusually often with this medicine.

47Reports
2.1%Marked serious
8.5%Recovered
11%Died or euthanised
2 daysTypical onset
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How soon it started

Same day
3 25%
1–2 days
4 33%
3–7 days
2 17%
1–4 weeks
2 17%
Over a month
1 8.3%

How the animals did

Recovered
4 8.5%
Still unwell when reported
7 15%
Died
5 11%
Not known
31 66%

Problems reported at the same time

15 32%
Allergic reaction
12 26%
6 13%
5 11%

Age of the animals

Under 1 year
33
1–3 years
6
4–7 years
3
8–11 years
1
12+ years
1

About this medicine

Type: medicine.

Questions owners ask

Can Amitraz cause swelling in dogs?
47 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.
How soon after a dose was it reported?
In half of the reports with dates, it started within 2 days of the first dose.
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).

Swelling with similar medicines

All reported side effects of Amitraz in dogs · Medicines most reported with swelling