Weight loss after Famotidine in dogs

231 reports to the FDA describe weight loss in dogs given Famotidine. That is 8.7% of all reports for this medicine, compared with 1.7% across reports for all dog medicines, so it is reported unusually often with this medicine.

231Reports
65%Marked serious
11%Recovered
32%Died or euthanised
8 daysTypical onset
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How soon it started

Same day
26 14%
1–2 days
27 14%
3–7 days
40 21%
1–4 weeks
46 24%
Over a month
49 26%

How the animals did

Recovered
21 9.1%
Recovered with lasting effects
4 1.7%
Still unwell when reported
93 40%
Died
23 10.0%
Euthanised
51 22%
Not known
39 17%

Problems reported at the same time

Age of the animals

Under 1 year
8
1–3 years
33
4–7 years
57
8–11 years
87
12+ years
43

About this medicine

Type: medicine.

Questions owners ask

Can Famotidine cause weight loss in dogs?
231 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 8 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).

Weight loss with similar medicines

All reported side effects of Famotidine in dogs · Medicines most reported with weight loss