Lysine side effects in cats
111 reports sent to the FDA between 2012 and 2026 involve Lysine in cats. The most reported problems were loss of appetite, vomiting, lethargy. 46% were marked serious.
111Reports
46%Marked serious
0.0%Only medicine involved
18%Recovered
16%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 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 (83 reports).
How the animals did
Breeds named most often
Popular breeds appear more often because there are more of them.
- Domestic Shorthair 63 reports
- Domestic Mediumhair 8 reports
- Domestic Longhair 6 reports
- American Curl Shorthair 4 reports
- Cat (other) 4 reports
- Persian 3 reports
- Ragdoll 3 reports
- Siamese 3 reports
- Bengal 2 reports
- Russian 2 reports
Other medicines for cats
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