Weakness after Cefovecin (Convenia) in cats

279 reports to the FDA describe weakness in cats given Cefovecin. That is 3.2% of all reports for this medicine, compared with 1.2% across reports for all cat medicines, so it is reported unusually often with this medicine.

279Reports

66%Marked serious

6.1%Recovered

45%Died or euthanised

2 daysTypical onset

How soon it started

Same day

70 31%

1–2 days

45 20%

3–7 days

47 21%

1–4 weeks

48 21%

Over a month

19 8.3%

How the animals did

Recovered

17 6.1%

Still unwell when reported

89 32%

Died

69 25%

Euthanised

57 20%

Not known

47 17%

Problems reported at the same time

140 50%

126 45%

125 45%

89 32%

60 22%

60 22%

50 18%

50 18%

Age of the animals

Under 1 year

1–3 years

4–7 years

8–11 years

12+ years

117

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 weakness in cats?: 279 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 2 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).

Weakness with similar medicines

Weakness after Amoxicillin + Clavulanate (Clavamox) 66 reports · 2.8% of its reports
Weakness after Enrofloxacin (Baytril) 33 reports · 2.1% of its reports

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