Famotidine side effects in cats

406 reports sent to the FDA between 2009 and 2026 involve Famotidine in cats. The most reported problems were loss of appetite, lethargy, vomiting. 57% were marked serious, and where it was recorded, signs eased after stopping the medicine in 0% of cases.

406Reports
57%Marked serious
0.2%Only medicine involved
20%Recovered
25%Died or euthanised
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About this medicine

Type: medicine.

Most reported side effects

Share = percentage of this medicine's reports that mention the problem. One report can list several problems.

Reports that it didn't work

Some reports are about the medicine not working (for example a cat still getting fleas or heartworm), not about a side effect.

Didn't stop fleas
3 0.7%
Didn't stop worms
1 0.2%

How soon problems started

Same day
106 29%
1–2 days
83 23%
3–7 days
50 14%
1–4 weeks
62 17%
Over a month
63 17%

Time from the first dose to the first sign, where both dates were reported (364 reports).

How the animals did

Recovered
78 19%
Recovered with lasting effects
3 0.7%
Still unwell when reported
142 35%
Died
39 9.6%
Euthanised
61 15%
Not known
83 20%

Breeds named most often

Popular breeds appear more often because there are more of them.

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