Diarrhea after Famotidine in dogs

The FDA has received 592 reports of diarrhea in dogs after Famotidine. That is 22% of all reports for this medicine, compared with 8.4% across reports for all dog medicines, so it is reported unusually often with this medicine.

592Reports
60%Marked serious
22%Recovered
26%Died or euthanised
4 daysTypical onset
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How soon it started

Same day
122 25%
1–2 days
93 19%
3–7 days
60 12%
1–4 weeks
94 19%
Over a month
118 24%

How the animals did

Recovered
128 22%
Recovered with lasting effects
3 0.5%
Still unwell when reported
221 37%
Died
53 9.0%
Euthanised
100 17%
Not known
87 15%

Problems reported at the same time

Age of the animals

Under 1 year
40
1–3 years
110
4–7 years
143
8–11 years
188
12+ years
104

About this medicine

Type: medicine.

Questions owners ask

Can Famotidine cause diarrhea in dogs?
592 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 4 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 Famotidine in dogs · Medicines most reported with diarrhea