Weight loss after Cefovecin (Convenia) in cats

The FDA has received 768 reports of weight loss in cats after Cefovecin. That is 8.8% of all reports for this medicine, compared with 4.6% across reports for all cat medicines, so it is reported unusually often with this medicine.

768Reports
55%Marked serious
7.3%Recovered
28%Died or euthanised
4 daysTypical onset
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How soon it started

Same day
136 22%
1–2 days
117 19%
3–7 days
120 20%
1–4 weeks
139 23%
Over a month
102 17%

How the animals did

Recovered
52 6.8%
Recovered with lasting effects
4 0.5%
Still unwell when reported
319 42%
Died
104 14%
Euthanised
111 14%
Not known
178 23%

Problems reported at the same time

Age of the animals

Under 1 year
32
1–3 years
103
4–7 years
148
8–11 years
202
12+ years
273

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 weight loss in cats?
768 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).

Weight loss with similar medicines

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