Skin ulcer after Cefovecin (Convenia) in cats

The FDA has received 75 reports of skin ulcer in cats after Cefovecin. That is 0.9% of all reports for this medicine, compared with 0.3% across reports for all cat medicines, so it is reported unusually often with this medicine.

75Reports
56%Marked serious
16%Recovered
8.0%Died or euthanised
17 daysTypical onset
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How soon it started

Same day
3 5.7%
1–2 days
4 7.5%
3–7 days
13 25%
1–4 weeks
13 25%
Over a month
20 38%

How the animals did

Recovered
12 16%
Still unwell when reported
37 49%
Died
3 4.0%
Euthanised
3 4.0%
Not known
20 27%

Problems reported at the same time

Skin rash or irritation
34 45%
Didn't work as expected
26 35%
Itching
26 35%
Hair loss
23 31%
Skin scab
16 21%
Loss of appetite
14 19%
Crust
12 16%
Weight loss
11 15%

Age of the animals

Under 1 year
7
1–3 years
9
4–7 years
12
8–11 years
20
12+ years
26

About this medicine

Cefovecin a long-acting antibiotic injection.

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

Questions owners ask

Can Cefovecin cause skin ulcer in cats?
75 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 17 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).

All reported side effects of Cefovecin in cats · Medicines most reported with skin ulcer