Weakness after Famotidine in dogs

148 reports to the FDA describe weakness in dogs given Famotidine. That is 5.6% of all reports for this medicine, compared with 1.4% across reports for all dog medicines, so it is reported unusually often with this medicine.

148Reports
82%Marked serious
11%Recovered
53%Died or euthanised
7 daysTypical onset
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How soon it started

Same day
26 20%
1–2 days
23 18%
3–7 days
19 15%
1–4 weeks
29 22%
Over a month
34 26%

How the animals did

Recovered
14 9.5%
Recovered with lasting effects
2 1.4%
Still unwell when reported
37 25%
Died
33 22%
Euthanised
45 30%
Not known
17 11%

Problems reported at the same time

Age of the animals

Under 1 year
9
1–3 years
20
4–7 years
17
8–11 years
57
12+ years
45

About this medicine

Type: medicine.

Questions owners ask

Can Famotidine cause weakness in dogs?
148 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 7 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).

Weakness with similar medicines

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