Abnormal ultrasound finding after Cefovecin (Convenia) in cats

The FDA has received 156 reports of abnormal ultrasound finding in cats after Cefovecin. That is 1.8% of all reports for this medicine, compared with 0.5% across reports for all cat medicines, so it is reported unusually often with this medicine.

156Reports

58%Marked serious

3.8%Recovered

38%Died or euthanised

4 daysTypical onset

How soon it started

Same day

18 17%

1–2 days

20 18%

3–7 days

34 31%

1–4 weeks

27 25%

Over a month

10 9.2%

How the animals did

Recovered

6 3.8%

Still unwell when reported

62 40%

Died

27 17%

Euthanised

33 21%

Not known

28 18%

Problems reported at the same time

100 64%

77 49%

70 45%

61 39%

51 33%

46 29%

46 29%

41 26%

Age of the animals

Under 1 year

1–3 years

4–7 years

8–11 years

12+ years

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 abnormal ultrasound finding in cats?: 156 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).

Abnormal ultrasound finding with similar medicines

Abnormal ultrasound finding after Amoxicillin + Clavulanate (Clavamox) 41 reports · 1.7% of its reports

All reported side effects of Cefovecin in cats · Medicines most reported with abnormal ultrasound finding