Tremors after Hydroxyzine in dogs

57 reports to the FDA describe tremors in dogs given Hydroxyzine. That is 5.5% of all reports for this medicine, compared with 3.4% across reports for all dog medicines, so it is reported unusually often with this medicine.

57Reports
44%Marked serious
35%Recovered
3.5%Died or euthanised
91 daysTypical onset
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How soon it started

Same day
8 18%
1–2 days
2 4.5%
3–7 days
3 6.8%
1–4 weeks
6 14%
Over a month
25 57%

How the animals did

Recovered
15 26%
Recovered with lasting effects
5 8.8%
Still unwell when reported
20 35%
Died
1 1.8%
Euthanised
1 1.8%
Not known
15 26%

Problems reported at the same time

Age of the animals

Under 1 year
1
1–3 years
13
4–7 years
17
8–11 years
16
12+ years
10

About this medicine

Type: medicine.

Questions owners ask

Can Hydroxyzine cause tremors in dogs?
57 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 91 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).

Tremors with similar medicines

All reported side effects of Hydroxyzine in dogs · Medicines most reported with tremors