Fenbendazole side effects in dogs
5,882 reports sent to the FDA between 1995 and 2026 involve Fenbendazole in dogs. The most reported problems were vomiting, diarrhea, lethargy. 32% were marked serious, and where it was recorded, signs eased after stopping the medicine in 100% of cases.
5,882Reports
32%Marked serious
69%Only medicine involved
19%Recovered
9.0%Died or euthanised
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About this medicine
Fenbendazole treats intestinal worms and some other parasites.
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 (2,991 reports).
How the animals did
Breeds named most often
Popular breeds appear more often because there are more of them.
- Labrador Retriever 375 reports
- Pit Bull 278 reports
- Chihuahua 214 reports
- German Shepherd Dog 210 reports
- Greyhound 195 reports
- Beagle 139 reports
- Golden Retriever 131 reports
- Boxer (german Boxer) 105 reports
- Shih Tzu 97 reports
- Yorkshire Terrier 89 reports