Lethargy after Amantadine in dogs

73 reports to the FDA describe lethargy in dogs given Amantadine. That is 14% of all reports for this medicine, compared with 11% across reports for all dog medicines.

73Reports
71%Marked serious
8.2%Recovered
37%Died or euthanised
26 daysTypical onset
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How soon it started

Same day
8 15%
1–2 days
7 13%
3–7 days
4 7.3%
1–4 weeks
10 18%
Over a month
26 47%

How the animals did

Recovered
6 8.2%
Still unwell when reported
33 45%
Died
10 14%
Euthanised
17 23%
Not known
7 9.6%

Problems reported at the same time

Age of the animals

Under 1 year
0
1–3 years
0
4–7 years
5
8–11 years
34
12+ years
34

About this medicine

Type: medicine.

Questions owners ask

Can Amantadine cause lethargy in dogs?
73 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 26 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 Amantadine in dogs · Medicines most reported with lethargy