Vocalising after Fentanyl in dogs

The FDA has received 119 reports of vocalising in dogs after Fentanyl. That is 19% of all reports for this medicine, compared with 1.2% across reports for all dog medicines, so it is reported unusually often with this medicine.

119Reports
38%Marked serious
67%Recovered
16%Died or euthanised
1 daysTypical onset
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How soon it started

Same day
44 44%
1–2 days
29 29%
3–7 days
6 6.1%
1–4 weeks
5 5.1%
Over a month
15 15%

How the animals did

Recovered
72 61%
Recovered with lasting effects
8 6.7%
Still unwell when reported
4 3.4%
Died
5 4.2%
Euthanised
14 12%
Not known
16 13%

Problems reported at the same time

Age of the animals

Under 1 year
5
1–3 years
21
4–7 years
38
8–11 years
32
12+ years
8

About this medicine

Type: medicine.

Questions owners ask

Can Fentanyl cause vocalising in dogs?
119 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 1 day 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).

Vocalising with similar medicines

All reported side effects of Fentanyl in dogs · Medicines most reported with vocalising