Lethargy after Denamarin in dogs

The FDA has received 90 reports of lethargy in dogs after Denamarin. That is 23% of all reports for this medicine, compared with 11% across reports for all dog medicines, so it is reported unusually often with this medicine.

90Reports
84%Marked serious
10%Recovered
31%Died or euthanised
14 daysTypical onset
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How soon it started

Same day
16 21%
1–2 days
9 12%
3–7 days
10 13%
1–4 weeks
15 20%
Over a month
26 34%

How the animals did

Recovered
9 10%
Still unwell when reported
38 42%
Died
8 8.9%
Euthanised
20 22%
Not known
15 17%

Problems reported at the same time

Age of the animals

Under 1 year
1
1–3 years
7
4–7 years
9
8–11 years
29
12+ years
43

About this medicine

Type: medicine.

Questions owners ask

Can Denamarin cause lethargy in dogs?
90 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 14 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).

Lethargy with similar medicines

All reported side effects of Denamarin in dogs · Medicines most reported with lethargy