Loose stool after Famotidine in dogs

The FDA has received 99 reports of loose stool in dogs after Famotidine. That is 3.7% of all reports for this medicine, compared with 0.9% across reports for all dog medicines, so it is reported unusually often with this medicine.

99Reports
58%Marked serious
16%Recovered
26%Died or euthanised
14 daysTypical onset
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How soon it started

Same day
17 20%
1–2 days
11 13%
3–7 days
11 13%
1–4 weeks
18 21%
Over a month
27 32%

How the animals did

Recovered
16 16%
Still unwell when reported
44 44%
Died
5 5.1%
Euthanised
21 21%
Not known
13 13%

Problems reported at the same time

Age of the animals

Under 1 year
4
1–3 years
17
4–7 years
29
8–11 years
26
12+ years
22

About this medicine

Type: medicine.

Questions owners ask

Can Famotidine cause loose stool 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 14 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).

Loose stool with similar medicines

All reported side effects of Famotidine in dogs · Medicines most reported with loose stool