Dehydration after Famotidine in cats

45 reports to the FDA describe dehydration in cats given Famotidine. That is 11% of all reports for this medicine, compared with 2.0% across reports for all cat medicines, so it is reported unusually often with this medicine.

45Reports
89%Marked serious
4.4%Recovered
44%Died or euthanised
3 daysTypical onset
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How soon it started

Same day
10 23%
1–2 days
8 19%
3–7 days
10 23%
1–4 weeks
7 16%
Over a month
8 19%

How the animals did

Recovered
2 4.4%
Still unwell when reported
12 27%
Died
6 13%
Euthanised
14 31%
Not known
11 24%

Problems reported at the same time

Age of the animals

Under 1 year
4
1–3 years
7
4–7 years
13
8–11 years
10
12+ years
11

About this medicine

Type: medicine.

Questions owners ask

Can Famotidine cause dehydration in cats?
45 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 3 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).

Dehydration with similar medicines

All reported side effects of Famotidine in cats · Medicines most reported with dehydration