Breathing problems after Cefovecin (Convenia) in cats

The FDA has received 739 reports of breathing problems in cats after Cefovecin. That is 8.5% of all reports for this medicine, compared with 4.7% across reports for all cat medicines, so it is reported unusually often with this medicine.

739Reports
67%Marked serious
11%Recovered
51%Died or euthanised
Same dayTypical onset
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How soon it started

Same day
289 51%
1–2 days
117 21%
3–7 days
61 11%
1–4 weeks
69 12%
Over a month
29 5.1%

How the animals did

Recovered
81 11%
Recovered with lasting effects
1 0.1%
Still unwell when reported
182 25%
Died
272 37%
Euthanised
106 14%
Not known
97 13%

Problems reported at the same time

Age of the animals

Under 1 year
44
1–3 years
125
4–7 years
147
8–11 years
177
12+ years
219

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 breathing problems in cats?
739 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 the same day 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).

Breathing problems with similar medicines

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