Behaviour change after Amitraz in dogs

The FDA has received 37 reports of behaviour change in dogs after Amitraz. That is 4.9% of all reports for this medicine, compared with 2.5% across reports for all dog medicines, so it is reported unusually often with this medicine.

37Reports
5.4%Marked serious
14%Recovered
5.4%Died or euthanised
12 daysTypical onset
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How soon it started

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

How the animals did

Recovered
4 11%
Recovered with lasting effects
1 2.7%
Still unwell when reported
4 11%
Died
1 2.7%
Euthanised
1 2.7%
Not known
26 70%

Problems reported at the same time

13 35%
Vocalising
6 16%
Restlessness or agitation
4 11%
3 8.1%

Age of the animals

Under 1 year
21
1–3 years
14
4–7 years
0
8–11 years
2
12+ years
0

About this medicine

Type: medicine.

Questions owners ask

Can Amitraz cause behaviour change in dogs?
37 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 12 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).

Behaviour change with similar medicines

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