Cephalexin side effects in dogs
2,680 reports sent to the FDA between 1999 and 2026 involve Cephalexin in dogs. The most reported problems were vomiting, lethargy, loss of appetite. 39% were marked serious, and where it was recorded, signs eased after stopping the medicine in 70% of cases.
2,680Reports
39%Marked serious
13%Only medicine involved
39%Recovered
10%Died or euthanised
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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 (2,176 reports).
How the animals did
Breeds named most often
Popular breeds appear more often because there are more of them.
- Labrador Retriever 291 reports
- German Shepherd Dog 150 reports
- Golden Retriever 101 reports
- Pit Bull 84 reports
- Bulldog 82 reports
- Boxer (german Boxer) 76 reports
- Bull - American Pit Terrier 64 reports
- Beagle 37 reports
- Australian Shepherd Dog 35 reports
- Doberman Pinscher 33 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