Lethargy after Glucosamine in dogs

379 reports to the FDA describe lethargy in dogs given Glucosamine. That is 21% of all reports for this medicine, compared with 11% across reports for all dog medicines, so it is reported unusually often with this medicine.

379Reports
52%Marked serious
32%Recovered
19%Died or euthanised
40 daysTypical onset
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How soon it started

Same day
42 17%
1–2 days
25 10%
3–7 days
25 10%
1–4 weeks
27 11%
Over a month
130 52%

How the animals did

Recovered
102 27%
Recovered with lasting effects
18 4.7%
Still unwell when reported
111 29%
Died
19 5.0%
Euthanised
53 14%
Not known
76 20%

Problems reported at the same time

Age of the animals

Under 1 year
0
1–3 years
25
4–7 years
75
8–11 years
160
12+ years
117

About this medicine

Type: medicine.

Questions owners ask

Can Glucosamine cause lethargy in dogs?
379 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 40 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 Glucosamine in dogs · Medicines most reported with lethargy