Death after Fentanyl in dogs

138 reports to the FDA describe death in dogs given Fentanyl. That is 22% of all reports for this medicine, compared with 5.2% across reports for all dog medicines, so it is reported unusually often with this medicine.

138Reports
95%Marked serious
0.0%Recovered
99%Died or euthanised
6 daysTypical onset
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How soon it started

Same day
17 15%
1–2 days
25 22%
3–7 days
20 18%
1–4 weeks
21 18%
Over a month
31 27%

How the animals did

Still unwell when reported
1 0.7%
Died
55 40%
Euthanised
81 59%
Not known
1 0.7%

Problems reported at the same time

Age of the animals

Under 1 year
5
1–3 years
13
4–7 years
40
8–11 years
52
12+ years
18

About this medicine

Type: medicine.

Questions owners ask

Can Fentanyl cause death in dogs?
138 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 6 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).

Death with similar medicines

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