Diarrhea after Hydroxyzine in dogs

The FDA has received 99 reports of diarrhea in dogs after Hydroxyzine. That is 9.6% of all reports for this medicine, compared with 8.4% across reports for all dog medicines.

99Reports
51%Marked serious
41%Recovered
7.1%Died or euthanised
16 daysTypical onset
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How soon it started

Same day
9 16%
1–2 days
6 11%
3–7 days
6 11%
1–4 weeks
10 18%
Over a month
25 45%

How the animals did

Recovered
37 37%
Recovered with lasting effects
4 4.0%
Still unwell when reported
33 33%
Died
5 5.1%
Euthanised
2 2.0%
Not known
18 18%

Problems reported at the same time

Age of the animals

Under 1 year
10
1–3 years
18
4–7 years
30
8–11 years
30
12+ years
11

About this medicine

Type: medicine.

Questions owners ask

Can Hydroxyzine cause diarrhea in dogs?
99 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 16 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).

Diarrhea with similar medicines

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