Lethargy after Fentanyl in dogs
The FDA has received 119 reports of lethargy in dogs after Fentanyl. That is 19% of all reports for this medicine, compared with 11% across reports for all dog medicines, so it is reported unusually often with this medicine.
119Reports
71%Marked serious
33%Recovered
42%Died or euthanised
2 daysTypical onset
Sponsored
How soon it started
How the animals did
Problems reported at the same time
Age of the animals
About this medicine
Type: medicine.
Questions owners ask
- Can Fentanyl cause lethargy 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 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).
Lethargy with similar medicines
- Lethargy after Melarsomine (Immiticide) 2,412 reports · 11% of its reports
- Lethargy after Polysulfated Glycosaminoglycan 1,037 reports · 19% of its reports
- Lethargy after Diphenhydramine 1,169 reports · 25% of its reports
- Lethargy after Butorphanol 661 reports · 15% of its reports
- Lethargy after Cefpodoxime 737 reports · 18% of its reports
- Lethargy after Tramadol 833 reports · 22% of its reports
- Lethargy after Florfenicol + Mometasone + Terbinafine 425 reports · 12% of its reports
- Lethargy after Desoxycorticosterone Pivalate 630 reports · 19% of its reports
- Lethargy after Propofol 315 reports · 10% of its reports
- Lethargy after Dirlotapide 460 reports · 16% of its reports
All reported side effects of Fentanyl in dogs · Medicines most reported with lethargy