Abnormal ultrasound finding after Fentanyl in dogs

29 reports to the FDA describe abnormal ultrasound finding in dogs given Fentanyl. That is 4.6% of all reports for this medicine, compared with 0.5% across reports for all dog medicines, so it is reported unusually often with this medicine.

29Reports

93%Marked serious

10%Recovered

69%Died or euthanised

25 daysTypical onset

How soon it started

Same day

1 4.2%

1–2 days

3 13%

3–7 days

3 13%

1–4 weeks

8 33%

Over a month

9 38%

How the animals did

Recovered

3 10%

Still unwell when reported

5 17%

Died

3 10%

Euthanised

17 59%

Not known

1 3.4%

Problems reported at the same time

21 72%

18 62%

18 62%

17 59%

17 59%

15 52%

14 48%

Abnormal radiograph finding

10 34%

Age of the animals

Under 1 year

1–3 years

4–7 years

8–11 years

12+ years

About this medicine

Type: medicine.

Questions owners ask

Can Fentanyl cause abnormal ultrasound finding in dogs?: 29 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 25 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).

Abnormal ultrasound finding with similar medicines

Abnormal ultrasound finding after Melarsomine (Immiticide) 64 reports · 0.3% of its reports
Abnormal ultrasound finding after Polysulfated Glycosaminoglycan 118 reports · 2.2% of its reports
Abnormal ultrasound finding after Diphenhydramine 87 reports · 1.8% of its reports
Abnormal ultrasound finding after Butorphanol 96 reports · 2.2% of its reports
Abnormal ultrasound finding after Cefpodoxime 114 reports · 2.8% of its reports
Abnormal ultrasound finding after Tramadol 189 reports · 5.0% of its reports
Abnormal ultrasound finding after Desoxycorticosterone Pivalate 35 reports · 1.0% of its reports
Abnormal ultrasound finding after Propofol 61 reports · 2.0% of its reports
Abnormal ultrasound finding after Isoflurane 74 reports · 2.7% of its reports
Abnormal ultrasound finding after Cephalexin 47 reports · 1.8% of its reports

All reported side effects of Fentanyl in dogs · Medicines most reported with abnormal ultrasound finding