Heart murmur after Cefovecin (Convenia) in cats

88 reports to the FDA describe heart murmur in cats given Cefovecin. That is 1.0% 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.

88Reports

70%Marked serious

8.0%Recovered

35%Died or euthanised

4 daysTypical onset

How soon it started

Same day

23 27%

1–2 days

15 18%

3–7 days

16 19%

1–4 weeks

17 20%

Over a month

13 15%

How the animals did

Recovered

7 8.0%

Still unwell when reported

40 45%

Died

9 10%

Euthanised

22 25%

Not known

10 11%

Problems reported at the same time

49 56%

40 45%

33 38%

30 34%

22 25%

19 22%

18 20%

18 20%

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 heart murmur in cats?: 88 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).

Heart murmur with similar medicines

Heart murmur after Amoxicillin + Clavulanate (Clavamox) 20 reports · 0.8% of its reports

All reported side effects of Cefovecin in cats · Medicines most reported with heart murmur