Blood problems after Famotidine in dogs

300 reports to the FDA describe blood problems in dogs given Famotidine. That is 11% of all reports for this medicine, compared with 1.8% across reports for all dog medicines, so it is reported unusually often with this medicine.

300Reports
80%Marked serious
7.3%Recovered
53%Died or euthanised
5 daysTypical onset
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How soon it started

Same day
44 17%
1–2 days
44 17%
3–7 days
59 23%
1–4 weeks
64 24%
Over a month
51 19%

How the animals did

Recovered
21 7.0%
Recovered with lasting effects
1 0.3%
Still unwell when reported
109 36%
Died
53 18%
Euthanised
107 36%
Not known
9 3.0%

Problems reported at the same time

Age of the animals

Under 1 year
21
1–3 years
47
4–7 years
73
8–11 years
118
12+ years
39

About this medicine

Type: medicine.

Questions owners ask

Can Famotidine cause blood problems in dogs?
300 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 5 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).

Blood problems with similar medicines

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