Restlessness or agitation after Fentanyl in dogs

54 reports to the FDA describe restlessness or agitation in dogs given Fentanyl. That is 8.6% of all reports for this medicine, compared with 1.6% across reports for all dog medicines, so it is reported unusually often with this medicine.

54Reports
48%Marked serious
57%Recovered
22%Died or euthanised
2 daysTypical onset
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How soon it started

Same day
14 33%
1–2 days
10 23%
3–7 days
5 12%
1–4 weeks
5 12%
Over a month
9 21%

How the animals did

Recovered
29 54%
Recovered with lasting effects
2 3.7%
Still unwell when reported
6 11%
Died
2 3.7%
Euthanised
10 19%
Not known
5 9.3%

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
15
12+ years
5

About this medicine

Type: medicine.

Questions owners ask

Can Fentanyl cause restlessness or agitation in dogs?
54 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 2 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).

Restlessness or agitation with similar medicines

All reported side effects of Fentanyl in dogs · Medicines most reported with restlessness or agitation