Blood problems after Cefovecin (Convenia) in cats

780 reports to the FDA describe blood problems in cats given Cefovecin. That is 9.0% of all reports for this medicine, compared with 1.9% across reports for all cat medicines, so it is reported unusually often with this medicine.

780Reports
56%Marked serious
5.9%Recovered
37%Died or euthanised
5 daysTypical onset
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How soon it started

Same day
99 18%
1–2 days
114 21%
3–7 days
105 19%
1–4 weeks
156 29%
Over a month
72 13%

How the animals did

Recovered
45 5.8%
Recovered with lasting effects
1 0.1%
Still unwell when reported
298 38%
Died
164 21%
Euthanised
125 16%
Not known
147 19%

Problems reported at the same time

Age of the animals

Under 1 year
50
1–3 years
119
4–7 years
158
8–11 years
220
12+ years
214

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 blood problems in cats?
780 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).

Blood problems with similar medicines

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