Weight loss after Enrofloxacin (Baytril) in cats

60 reports to the FDA describe weight loss in cats given Enrofloxacin. That is 3.8% of all reports for this medicine, compared with 4.6% across reports for all cat medicines.

60Reports
67%Marked serious
12%Recovered
22%Died or euthanised
5 daysTypical onset
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How soon it started

Same day
8 18%
1–2 days
9 20%
3–7 days
8 18%
1–4 weeks
11 24%
Over a month
9 20%

How the animals did

Recovered
6 10%
Recovered with lasting effects
1 1.7%
Still unwell when reported
18 30%
Died
3 5.0%
Euthanised
10 17%
Not known
22 37%

Problems reported at the same time

Age of the animals

Under 1 year
3
1–3 years
5
4–7 years
18
8–11 years
11
12+ years
22

About this medicine

Enrofloxacin treats bacterial infections.

Products with this ingredient include Baytril. The FDA hides brand names in its public data, so these reports cover every product with the same active ingredients.

Questions owners ask

Can Enrofloxacin cause weight loss in cats?
60 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 5 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).

Weight loss with similar medicines

All reported side effects of Enrofloxacin in cats · Medicines most reported with weight loss