Neutrophilia after Famotidine in dogs

The FDA has received 148 reports of neutrophilia in dogs after Famotidine. That is 5.6% of all reports for this medicine, compared with 0.6% across reports for all dog medicines, so it is reported unusually often with this medicine.

148Reports
78%Marked serious
10%Recovered
46%Died or euthanised
6 daysTypical onset
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How soon it started

Same day
23 19%
1–2 days
21 17%
3–7 days
22 18%
1–4 weeks
39 31%
Over a month
19 15%

How the animals did

Recovered
15 10%
Still unwell when reported
47 32%
Died
19 13%
Euthanised
49 33%
Not known
18 12%

Problems reported at the same time

Age of the animals

Under 1 year
14
1–3 years
15
4–7 years
46
8–11 years
53
12+ years
20

About this medicine

Type: medicine.

Questions owners ask

Can Famotidine cause neutrophilia 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 6 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).

Neutrophilia with similar medicines

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