Feline Leukemia Vaccine side effects in cats
799 reports sent to the FDA between 2011 and 2026 involve Feline Leukemia Vaccine in cats. The most reported problems were lethargy, loss of appetite, vomiting. 57% were marked serious, and where it was recorded, signs eased after stopping the medicine in 100% of cases.
About this medicine
Type: vaccine.
Mild, short-lived lethargy, soreness or a small lump at the injection site are the most commonly reported vaccine reactions.
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 cat 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 (726 reports).
How the animals did
Breeds named most often
Popular breeds appear more often because there are more of them.
- Domestic Shorthair 564 reports
- Domestic Longhair 81 reports
- Domestic Mediumhair 52 reports
- Siamese 16 reports
- Cat (other) 11 reports
- Bengal 5 reports
- Maine Coon 4 reports
- Ragdoll 4 reports
- Russian 4 reports
- Persian 3 reports