Behaviour change after Glucosamine in dogs

113 reports to the FDA describe behaviour change in dogs given Glucosamine. That is 6.3% of all reports for this medicine, compared with 2.5% across reports for all dog medicines, so it is reported unusually often with this medicine.

113Reports
53%Marked serious
31%Recovered
23%Died or euthanised
50 daysTypical onset
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How soon it started

Same day
12 17%
1–2 days
4 5.7%
3–7 days
3 4.3%
1–4 weeks
11 16%
Over a month
40 57%

How the animals did

Recovered
28 25%
Recovered with lasting effects
7 6.2%
Still unwell when reported
29 26%
Died
8 7.1%
Euthanised
18 16%
Not known
23 20%

Problems reported at the same time

Age of the animals

Under 1 year
1
1–3 years
7
4–7 years
24
8–11 years
46
12+ years
32

About this medicine

Type: medicine.

Questions owners ask

Can Glucosamine cause behaviour change in dogs?
113 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 50 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).

Behaviour change with similar medicines

All reported side effects of Glucosamine in dogs · Medicines most reported with behaviour change