Abnormal pupil light reflex after Cefovecin (Convenia) in cats

The FDA has received 37 reports of abnormal pupil light reflex in cats after Cefovecin. That is 0.4% of all reports for this medicine, compared with 0.2% across reports for all cat medicines, so it is reported unusually often with this medicine.

37Reports
76%Marked serious
19%Recovered
38%Died or euthanised
1 daysTypical onset
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How soon it started

Same day
15 42%
1–2 days
7 19%
3–7 days
6 17%
1–4 weeks
5 14%
Over a month
3 8.3%

How the animals did

Recovered
6 16%
Recovered with lasting effects
1 2.7%
Still unwell when reported
13 35%
Died
4 11%
Euthanised
10 27%
Not known
3 8.1%

Problems reported at the same time

Age of the animals

Under 1 year
2
1–3 years
4
4–7 years
12
8–11 years
7
12+ years
12

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 pupil light reflex in cats?
37 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 1 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).

Abnormal pupil light reflex with similar medicines

All reported side effects of Cefovecin in cats · Medicines most reported with abnormal pupil light reflex