Lethargy after Marbofloxacin in dogs

The FDA has received 230 reports of lethargy in dogs after Marbofloxacin. That is 19% of all reports for this medicine, compared with 11% across reports for all dog medicines, so it is reported unusually often with this medicine.

230Reports
29%Marked serious
12%Recovered
22%Died or euthanised
6 daysTypical onset
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How soon it started

Same day
24 21%
1–2 days
23 20%
3–7 days
17 15%
1–4 weeks
28 25%
Over a month
22 19%

How the animals did

Recovered
28 12%
Still unwell when reported
48 21%
Died
30 13%
Euthanised
21 9.1%
Not known
103 45%

Problems reported at the same time

Age of the animals

Under 1 year
23
1–3 years
30
4–7 years
50
8–11 years
69
12+ years
52

About this medicine

Type: medicine.

Questions owners ask

Can Marbofloxacin cause lethargy in dogs?
230 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).

Lethargy with similar medicines

All reported side effects of Marbofloxacin in dogs · Medicines most reported with lethargy