Methadone side effects in dogs
238 reports sent to the FDA between 2014 and 2026 involve Methadone in dogs. The most reported problems were loss of appetite, lethargy, liver problems. 73% were marked serious, and where it was recorded, signs eased after stopping the medicine in 67% of cases.
238Reports
73%Marked serious
0.0%Only medicine involved
36%Recovered
24%Died or euthanised
Sponsored
About this medicine
Type: medicine.
Most reported side effects
Share = percentage of this medicine's reports that mention the problem. One report can list several problems.
Reports that it didn't work
Some reports are about the medicine not working (for example a dog still getting fleas or heartworm), not about a side effect.
How soon problems started
Time from the first dose to the first sign, where both dates were reported (197 reports).
How the animals did
Breeds named most often
Popular breeds appear more often because there are more of them.
- Labrador Retriever 30 reports
- Golden Retriever 11 reports
- Boxer (german Boxer) 6 reports
- Bull - American Pit Terrier 6 reports
- Dachshund 5 reports
- German Shepherd Dog 5 reports
- West Highland White Terrier 4 reports
- Bichon Frise 4 reports
- Weimaraner 4 reports
- Great Pyrenees 4 reports
Other medicines for dogs
Melarsomine (Immiticide)22,672 reports · 41% seriousPolysulfated Glycosaminoglycan5,465 reports · 33% seriousDiphenhydramine4,724 reports · 48% seriousButorphanol4,441 reports · 55% seriousCefpodoxime4,055 reports · 36% seriousTramadol3,768 reports · 47% seriousFlorfenicol + Mometasone + Terbinafine3,542 reports · 60% seriousDesoxycorticosterone Pivalate3,337 reports · 38% serious