Loss of appetite after Metronidazole in cats

103 reports to the FDA describe loss of appetite in cats given Metronidazole. That is 26% of all reports for this medicine, compared with 14% across reports for all cat medicines, so it is reported unusually often with this medicine.

103Reports
61%Marked serious
19%Recovered
17%Died or euthanised
4 daysTypical onset
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How soon it started

Same day
19 21%
1–2 days
19 21%
3–7 days
17 19%
1–4 weeks
20 22%
Over a month
14 16%

How the animals did

Recovered
20 19%
Still unwell when reported
40 39%
Died
9 8.7%
Euthanised
9 8.7%
Not known
25 24%

Problems reported at the same time

Age of the animals

Under 1 year
10
1–3 years
11
4–7 years
22
8–11 years
23
12+ years
37

About this medicine

Metronidazole treats some bacterial and parasitic gut infections.

Questions owners ask

Can Metronidazole cause loss of appetite in cats?
103 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 4 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).

Loss of appetite with similar medicines

All reported side effects of Metronidazole in cats · Medicines most reported with loss of appetite