Diarrhea after Cetirizine in dogs

The FDA has received 76 reports of diarrhea in dogs after Cetirizine. That is 11% of all reports for this medicine, compared with 8.4% across reports for all dog medicines.

76Reports
46%Marked serious
38%Recovered
7.9%Died or euthanised
54 daysTypical onset
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How soon it started

Same day
8 14%
1–2 days
7 12%
3–7 days
4 6.8%
1–4 weeks
7 12%
Over a month
33 56%

How the animals did

Recovered
29 38%
Still unwell when reported
26 34%
Died
2 2.6%
Euthanised
4 5.3%
Not known
15 20%

Problems reported at the same time

Age of the animals

Under 1 year
1
1–3 years
18
4–7 years
24
8–11 years
17
12+ years
14

About this medicine

Type: medicine.

Questions owners ask

Can Cetirizine cause diarrhea in dogs?
76 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 54 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 Cetirizine in dogs · Medicines most reported with diarrhea